GB2218710A - Sintered Fe,Cu.Zn alloy - Google Patents
Sintered Fe,Cu.Zn alloy Download PDFInfo
- Publication number
- GB2218710A GB2218710A GB8910576A GB8910576A GB2218710A GB 2218710 A GB2218710 A GB 2218710A GB 8910576 A GB8910576 A GB 8910576A GB 8910576 A GB8910576 A GB 8910576A GB 2218710 A GB2218710 A GB 2218710A
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- GB
- United Kingdom
- Prior art keywords
- weight
- manganese
- sintered
- iron
- alloy material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/09—Mixtures of metallic powders
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0425—Copper-based alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
- F16C33/121—Use of special materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Powder Metallurgy (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The present invention provides a sintered alloy material comprising 20 to 80% by weight of iron, 11 to 52% by weight of copper, 6 to 32% by weight of zinc, 0.1 to 0.8% by weight of tin, 0.1 to 4.0% by weight of manganese and 0 to 4.0% by weight of aluminum and having a porosity of 15 to 28% by volume. This sintered alloy material is excellent in strength, corrosion resistance and fitness with a mating member such as a shaft and exhibits a low coefficient of friction, so that it is useful particularly as a bearing material. 0.5 to 5% of a solid lubricant such as M0S2, graphite or Pb may be included in the alloy.
Description
SINTERED ALLOY MATERIAL AND PROCESS FOR
THE PREPARATION OF THE SAME
Background of the Invention
Field of the Invention
The present invention relates to a sintered alloy material and a process for the preparation of te same.
Particularly, it provides a sintered alloy material which is excellent in strength, corrosion resistance and fitness, i.e. adaptability, with a mating member such as a shaft and exhibits a low coefficient of friction, thus having performance suitable for use as a bearing material and a process for the preparation of the same.
As described above, the present invention is applicable to s-tered alloy materials including oil-impregnated slntered bearings and the preparaton thereof.
Description of the Prior Art
JIS B 1581-1976 prescribes for an oil-imtre-nated sintered bearing. Particularly, it prescribes i detail for various bearings including those of cylindrical, flanged cylindrical and spherical shapes which are applicable to domestic electrical appliances, sound facilities, business machines, agricultural machines, automobiles and --;er cargo-transporting or machines. Further, it also contains description on bearing materials and rezresentative examples thereof including pure iron, iron-copper, iron-carbon, ironcopper-carbon, iron-copper-lead, bronze, copper and lead-bronze alloys.
Further, Japanese Patent Laid-Open No. 51554/1981 discloses a bearing material obtained by sintering a green compact comprising powdered iron and powdewd brass. Furthermore, it has been proposed in Japanese
Patent Liad-Open NO. 200-27/1985 by the inventors of the present inventIon to sinter a green compact comprising powderediron, powdered brass and powdered nickel silver in a rec-qving atmosphere.
The above oil-impregnated sintered bearings comprising iron as a ra-cr component are poor in their fitness with a mating ---oer and corrosion resistance.
so that the application thereof is limited, though they are excellent in skeletal strength to be suitable for use under a high oat.
On the contrary, the above oil-impregnated sintered bearings coy?~ sing copper or bronze as a major component are toc poor in strength to be used under a high load, though they are excellent in the fitness and corrosion resistance.
Although the above il-impregnated sintered bearings comprising iron and copper (including iron-copper-lead alloys and irot.-copper-carbon alloys) exhibit characteristics which are intermediate between those of the above two kinds of bearings, they are yet insufficient in strength and corrosion resistance.
The bearing of the Japanese Patent Laid-Open
No. 51554/1981 prepared by using a green compact comprising iron and brass is poor in strength and fitness with a mating member, tough it is excellent in corrosion resistance.
Further, the Japanese Patent Laid-Open No.
200927/1985 aims at attaining a sufficient improvement in the corrosion resistance and lowering in the coefficient of friction by the additional use of nickel silver, while securing the strength. However, the resulting bearing Is not always satisfactory in these characteristics, particularly n the fitness with a mating member such as a shaft.
The present invention prtides: A sintered alloy material comprising 20 to 80% by eight of iron, 11 to 52% by weight of copper, 6 to 32% by weight of zinc, 0.1 to 8.8% by weight of tin, 0.1 to 4.0% by weight of manganese and 0 to 4.08 by weight of al u-linum and haven a porosity of 15 to 28% by volume
a sintered alloy material comprising 20 to 80% by weight of iron, 8.3 to 51.7% by weight of copper, 4.5 to 31.88 by weight of zinc, 0.05 to 0.8% by weight of tin, 0.08 to 4.0% by weight of manganese, 0 to 4.0% by weight of aluminum and 0.5 to 5.0 % by weight of one or more solid lubricants such as graphite, molybdenum disulfide or lead and having a porosity of 15 to 28% by volume;; a process for the preparation of sintered alloy material which comprises adding 25 to 400 parts by weight of powdered manganese bronze comprising 30 to 40% by weight of zinc, 0.5 to 5% by weight of manganese, 0.3 to 1.0% by weight of tin, 0 to 5.0% by weIght of aluminum and the balance of copper and unavoidable impurities to 100 parts by weight of powderediron, compacting the obtained powder mixture, sintering the obtained green compact and sizing the sinterec compact so as to give a porosity of 15 to 28% by volume, and r process for the preparation o- a sintered alloy materIal which comprises adding 17.7 to 387.8 parts by weIght of powdered manganese bronze comprising 30 to 40- by weight of zinc, 0.5 to 5.0% by weight of manganese, 0.3 to 1.0 % by weight of tim, 0 to 5.0% by weight of aluminum and the balance of copper and unavoidable impurities and 0.5 to 5.3 parts by weight of one or more solid lubricants such as graphite1 molybdenum disulfide or lead to 100 parts by weight of powdered iron, compacting the obtained powder mixture, sintering the obtained green compact and sizing the sintered compact so as to give a porosity of 15 to 28% b volume.
Detailed DescrIption of Preferred Embodiments
The sintered alloy material according to the present invention comprises 20 to 80% by weight of iron, 11 to 52 % by weight of coopper, 6 to 32 % weight of zinc, 0.1 to 0.8% by weight of ti, < - to 4.0% by weight of aluminum and 0.1 to 4.0% by weight of manganese. Owing to this restriction on the composition, the material is improved in corrosion resistance and strength, while keeping the fitness with a rat-ng member at a high level. That is, high-strength manganese bronze is formed among iron powder articles by the addition of manganese, aluminum and tn n proper amounts to thereby improve the corrosion resistance without lowering the fitness with a mating member.
If the iron content is less than 20% by weight, the skeletal strength due to iron particles 111 not be obtained sufficiently and the use of large amounts of other components will be necessary resulting in an. enhanced cost. On the contrary, if the iron content exceeds 80% by weight, the coefficient of friction will be enhanced, while the corrosion resistance will be remarkably lowered.
The sintered material according to the preset invention contains at least 11.0% by weight of copper to thereby secure excellent fitness. Further, the copper content is also limited to 52% by weight or below to lower the cost.
The sintered material according to the present invention contains at least 6% by weight of zinc, which is coupled with copper, manganese, aluminum ant tin to secure high corrosion resistance. The zinc content is also limited to 32.0% by weight or below to secure suitable fItness. Further, the material of the present invent on contains at least 0.1% by weight of manganese ts thereby enhance the strength and corrosion resistance efficiently.The manganese content is also limited to 4.0t by weight or below, so that excellent =~=-ess is secured, while the increase in the coefficient of friction is depressed.
The powder mixture comprising the above components is compacted, sinteret and sized so as to give a porosity of at least 15% by volume. The sized compact thus obtained can be impregnated with a suitable amount of oil to exhibit improved lubricating properties. The porosity is also limited to 28% by volume or below to secure high strength.
The material of the present invention may contain at least 0.5% by weight of one or more solid lubricants such as graphite, molybdenum disulfide or lead for the purpose of enhancing te lubricating properties and reducing the coefficient of friction. The content thereof is also limited to 5.3 by weight or below to thereby secure high strength.
According to the present invention, copper, zinc, manganese, aluminum and tin are simultaneously added as manganese bronze powder comprising 30 to 40% by weight of zinc, 0.5 to 5.0 -y weight of manganese, 0.3 to 1.0% by weight of ti, 0 to 5.0% by weight of aluminum and the balance of copper and unavoidable impurities. This method of adding manganese bronze powder overcomes a trouble c separately preparing these components and successively adding them and prevents the segregation cf each component to permit the homogeneous mixing of the components and the easy formation of a sinter of a homogeneous structure.
Accordingly, the sinter thule obtained exhibits characteristics by virtue of the high-strength copper alloy formed among iron particles.
According to the present invention, iron powder and high-strength copper alloy powder (i.e., manganese bronze) can be suitably sintered at 800 to 9500C.
The sintering of a green compact is preferably carried out in a state wherein the green compact is placed in a heat-resistant container kept apart from its bottom and the container is closed, so that the loss of zinc by evaporation is prevented and a homogeneous sintered structure can be formed.
According to the present invention, the sinter is sized so as to give a porosity of at least 15% by volume. Thus, an article containing pores suitable for oil impregnation dispersed therein can be obtained to permit the formation of a bearIng having preferred lubricating properties. The porosity is also limited to -Ot by volume or below, so that a suitable radial crusting strength coefficient is secured and the scattering or run-off of impregnating oil is prevented.
Particular embodiments according to the present invention will now be described In ore detail. The present invention relates to a sintered alloy substantially comprising iron, copper, zinc and mananese. Although these comp s may be separately prepared, as described above, they may be prepared as an alloy. For example, a combination of a manganese-aluminum alloy powder with brass powder and iron powder and a combination of 95 to 98 Mn alloy powder wit brass powder and iron powder can be used.
Particularl, it is preferred to use pure iron powder and manganese bronze powder as raw materials.
According to the present invention, the iron content is generally 20 to 80 % by weight, preferably 30 to 608 by weight, still preferably 40 t 55% by weight.
The copper content is generally 11 to 2% by weight, preferably 25 to 50% by weight, still preferably 35 to 45 by weight.
The zinc content is generally 6 to 32 % by weight, preferably 8 to 25 % by weight, still preferably 10 to 25% by weight.
The anganese content is generally 0.1 to 4.02 by weight, preferably 0.5 to 2.0% by weight.
According to the present invention, te manganese bronze described in Table 2 of JIS H 2205 containing at most 5% 5 weight of aluminum may be used so as to give an artIcle containing at most 4.0% t eight thereof. The strength and other characteristics of the siterz, material according to the present invention are not particularly affected by the presence of such a amount of aluminum, so that the material may contaIn substantially no aluminum.
The compaction is generally carried out under a load of about 2 to 3 ton/cm2 and the porosity of the obtained green compact is 22 to 35% by volume.
If the porosity of the green compact is less than 22% by volume, it will be difficult to size the green compact so as to ie an article having a porosity suitable for oil i=cregnation. On the contrary, a green compact ha-:lng a porosity exceeding 35î volume tends to breaker chip off during sintering.
The sintering is carried out at 800 to 950 C In a reducing atmosphere. As described above, fro te standpoint of prev-nting the evaporation of zinc, it is preferred te carry out the sintering in a closed heat-resistant container. Of course, the sintering may be carried out in a state buried In carbon powder. Further, the evaporation of zin during sintering can be prevented by the presence tin in the above manganese bronze powder.
It is of a usual practice to add a solid lubricant such as graphite or molybdenum di sulfIde as a powder. However, a solid lubricant such graphite has a sraffiler specific gravity than that of any of iron powder and manganese bronze powder, so that it is difficult to homogeneously disperse such a solid lubricant in the other powdery materials merely by mixing and the graphite powder comes to the surface or is localized i the transportation, feeding into a press hopper or compaction to cause segregation.
Therefore, it is advantageous that a solid lubricant (such as graphite) of relatively coarse powder is selected and is further s-~jected to classification to remove finer powders prior to its use, which has been experimentally confirmed. That is, it is preferred that the solid lubricant to be used in the present invention have a particle size of 10 to 150 um, particularly 20 to 100 @m, though a commercially available one generally has a particle size of 1 to 30 m, or 1 to 50 em. That is, according to the preset invention, a solid lubricant obtained by ridding a coarse solid lubricant c- iner particles having a size smaller than 10 m cr 20 m is preferably used so that the homogeneous Istersion thereof is facilitated and the segre-ation thereof is prevented during transportation a other handing. The above finer particles having z size smaller than 10 m or 20 m can be effectively separated off by wet classificaticn, without -nerating dust.
If necessary, the sintered alloy material according to the present invention may suitably contain other metal or alloy. For example, even when the material further contains Pb, Ni or Si in a small amount, the characteristics of the present invention are not affected adversely. Such alloys include Sn-containing brass, Al-containing brass,
Pb-containing brass, Ni-containing brass, Fecontaining brass and Si-contaiing brass.
The green compact containing manganese bronze causes deformation, distortion and dimensional change by sintering, so that the sintered compact must be sized to obtain an article having predetermined dimensions.
Preparative Examples accc--ing to the present invention will now be described.
rearative Example 1
Iron powder having a partIcle size of 100 mesh smaller was blended with manganese bronze powder comprising 64.5% by weight of copper, 30% by weight of zinc, 5.0% by weight of manganese and 0.5E by eight of tin and having a partIcle size of 100 mesh cr smaller in a weight ratio given in Table 1.
Table 1 (parts by weight)
1-Iron powder | Manganese bronze powder cm 100 parts | 400 parts 100 | 100 parts 100 parts 100 parts 25 parts 100 parts 150 parts The raw materials 1 to 4 shown in Table 1 were eac compacted into an annular bearing and put on a gauzy material placed on the bottom of a heatresistant box of iron, i.e., in a state apart from the bottom, and the box closed. The tubes were sintered in a reducing atmosphere of ammania gas at 8900C for 45 minutes. The sinters thus obtained were sized to obtaIn articles each having a porosity of 20% by volume. The articles were vacuum-impregnated with turbine 11 to obtain oil-impregnated bearings.
Separately, comparative bearings GA: and B having the same porosity as the one described above were prepared by using iron alone or a mixture comprising 50% o Iron powder and 50% of brass powder, respectively.
The bearings 1 to 4 and the comparative bearings and and b were examined for radial crushing strength constant, coefficient of fricticn and temperature rise caused by continuous rotation with a PV value of 1000 kgf/cm. m/min for 40 minutes. The results are shown in Table 2.
Table 2
Radial Temperature crushing Coefficient rise caused strength of friction by continuous constant o rlc 1O rotation (kg/cm2) ("C) Bearing of the present invention G-- 27 0.074 2C., 30 30 I 0.076 " @ 34 1 0.086 4 27 " @ 30 ! 0.072 i 22.c Comparative 36 1 bearing 36 . 36 , 0.10 21 0.08 The bearings (1) to 4 according to the resent invention and the comparative bearings A and were also examined for the corrosion resistance at a humidity of 80% and 80 C to determine the tim which has elapsed until the generation of rus is observed. The results are shown in Table 3.
Table 3
Time which has elapsed until rust is observed (days) Bearing of the present invention Ol 120 or above 0 78 or above Q3 @ 50 or above ! S 70 or above Comparative bearing - 6 60 60 1 60 or above It can be understood from the above results that the bearings according to the present invention are all excellent in strength and bearing properties and are remarkably improved in corrosion resistance for their content of copper alloy.
Preparative Example 2
The same procedure as the one described in
Preparative Example 1 was repeated by using the sane raw materials as those shown in the column t' of
Table 1 except that graphite powder was further added in an amount of 2s by weight (outer percentage)
The bearing thus obtained exhibited a coefficient of friction of 0.057, -hich reveals that the bearin is extremely excellent in lubricating properties.
Further, it exhibited a radial crushing strength constant of 38 kg/mm2 , which reveals that it is also excellent in strength.
Preparative Example 3
100 parts by weight of the same iron powder as that used in Preparative Example 1 was blended with 150 parts by weight of manganese bronze comprising 63.58 by weight of copper,-2.5 by weight of zinc, 4.8% by weight of manganese, 0.z% by weight of tin and 1.7% by weight of aluminum. and having a particle size of 100 mesh or smaller. The obtained mixture was compacted, sintered and sized in a similar manner to that described in Preparat-ve Example 1 to obtain an article having a porosity cf 20%. This article was vacuum-impregnated with turbine oil to obtain an oil-impregnated bearing. is bearing exhibited a radial crushing strength constant of 29.8 kg/mm2 a coefficient of friction of .073 and temperature rise caused by continuous rotation of 22.20C, which reveals that it is excellent as an oil-impregnated bearing.
As described above, the present invention provides a sintered alloy material which is excellent in strength, corrosion resistance and fitness with a mating member such as a shaft at a low cost and a relatively simple process for the reparation of the same. Thus, the present invention is industrially valuable.
Claims (6)
1. A sintered alloy material comprising 20 to 80% by.weight of iron, 11 to 52% by weight of copper, 6 to 32% by weight of zinc, 0.1 to 0.8% b eight of tin, 0.1 to 4.0% by weight of manganese an to 4.0% by weight of aluminum and having a porosity f 15 to 28% by volume.
2. A sintered alloy material comprising 20 to 80% by weight o iron, 8.3 to 51.7 & by weight of copper, 4.5 to 32% by weight of zinc, 0.05 to 0.8= t weight of tin, 0.0e to 4.0% by weight of manganese, D to 4.0t by weight of aluminum and 0.5 to 5.0% -s- weight of one or more solid lubricants such as granite, molybdenum disulfide or lead and having a pcr osity of 15 to 282 by volume.
3. A process for the preparation of a s-ntered alloy material, which comprises adding 25 == 400 parts by weight of manganese bronze powder comprising 30 to 40% by weight of zinc, 0.5 to 5 b weight of manganese, 0.3 to 1.0% by weight of tin, 3 to 5.0% by weight c aluminum and the balance of zz--er and unavoidable impurities to 100 parts by weight of iron powder, compacting the obtained mixture, sintering the obtained green compact and sizing the sintered compact s as to give a porosity of 15 to 23% by volume.
4. A process for the preparation of a sintered alloy material as set forth in claim 3, wherein the green compact is sintered in a reducing atmosphere at 800 to 950 C in aclosed heat-resistant container.
5. A process for the preparation of a sintered alloy material, which comprises adding 17.7 to 387.8 parts by weight of manganese bronze powder comprIsing 30 to 40% by weight of zinc, 0.5 to 5% by weight o- manganese, 0.3 to '.0% by weight of tin, 0 to 5.0% by weight of aluminum and the balance of copper ana unavoidable impurities and 0.5 to 5.3 parts b weight of one or more solid lubricants such as graphite, molybdenum disulfide or lead to 100 parts by weight of iron powder, compacting the obtained mixture, sintering the obtained green compact and sizing the sintered compact so as to give a porosity of 15 28% by volume.
6. A process for the preparation of a sintered alloy material as set forth in claim 5, wherein tne green compact is sintered in a reducing atmosphere at 800 to 9500C in 2 closed heat-resistant container kept apart from its bottom.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63110563A JPH01283346A (en) | 1988-05-09 | 1988-05-09 | Sintered alloy material and its production |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8910576D0 GB8910576D0 (en) | 1989-06-21 |
| GB2218710A true GB2218710A (en) | 1989-11-22 |
| GB2218710B GB2218710B (en) | 1991-05-01 |
Family
ID=14539004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8910576A Expired - Lifetime GB2218710B (en) | 1988-05-09 | 1989-05-08 | Sintered alloy material and process for the preparation of the same |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH01283346A (en) |
| GB (1) | GB2218710B (en) |
| HK (1) | HK76691A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2317899A (en) * | 1996-10-02 | 1998-04-08 | Westaim Technologies Inc | Abradable seal assembly |
| WO2004073909A1 (en) * | 2003-02-21 | 2004-09-02 | Miyata Co., Ltd. | Porous material and method for producing porous material |
| FR2907468A1 (en) * | 2006-10-20 | 2008-04-25 | Airbus France Sas | Interface for adjusting lubrication and hardness interposed between first and second parts of titanium or titanium alloy, comprises first adjusting layer placed on first part, and second adjusting layer placed on second part |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111719086B (en) * | 2019-03-21 | 2022-03-22 | 南京理工大学 | Iron-based medium-high temperature self-lubricating material and preparation method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5651554A (en) * | 1979-10-01 | 1981-05-09 | Shiyooraito:Kk | Machine parts obtained by powder metallurgical method |
| JPS5696001A (en) * | 1979-12-29 | 1981-08-03 | Tatsunosuke Kikuchi | Sintered alloy |
| JPS57169064A (en) * | 1981-04-10 | 1982-10-18 | Hitachi Powdered Metals Co Ltd | Low wear sintered sliding material containing oil |
| JPS5896850A (en) * | 1981-12-04 | 1983-06-09 | Hitachi Powdered Metals Co Ltd | Low wear sintered sliding material containing oil |
| JPS6082646A (en) * | 1983-10-11 | 1985-05-10 | Tatsunosuke Kikuchi | Sintered alloy and its manufacture |
-
1988
- 1988-05-09 JP JP63110563A patent/JPH01283346A/en active Pending
-
1989
- 1989-05-08 GB GB8910576A patent/GB2218710B/en not_active Expired - Lifetime
-
1991
- 1991-10-03 HK HK766/91A patent/HK76691A/en not_active IP Right Cessation
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2317899A (en) * | 1996-10-02 | 1998-04-08 | Westaim Technologies Inc | Abradable seal assembly |
| US5976695A (en) * | 1996-10-02 | 1999-11-02 | Westaim Technologies, Inc. | Thermally sprayable powder materials having an alloyed metal phase and a solid lubricant ceramic phase and abradable seal assemblies manufactured therefrom |
| GB2317899B (en) * | 1996-10-02 | 2000-09-20 | Westaim Technologies Inc | Abradable seal assembly |
| WO2004073909A1 (en) * | 2003-02-21 | 2004-09-02 | Miyata Co., Ltd. | Porous material and method for producing porous material |
| FR2907468A1 (en) * | 2006-10-20 | 2008-04-25 | Airbus France Sas | Interface for adjusting lubrication and hardness interposed between first and second parts of titanium or titanium alloy, comprises first adjusting layer placed on first part, and second adjusting layer placed on second part |
Also Published As
| Publication number | Publication date |
|---|---|
| HK76691A (en) | 1991-10-11 |
| GB2218710B (en) | 1991-05-01 |
| GB8910576D0 (en) | 1989-06-21 |
| JPH01283346A (en) | 1989-11-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20020508 |