EP0976135A1 - Resistors formed of aluminum-titanium alloys - Google Patents
Resistors formed of aluminum-titanium alloysInfo
- Publication number
- EP0976135A1 EP0976135A1 EP98922040A EP98922040A EP0976135A1 EP 0976135 A1 EP0976135 A1 EP 0976135A1 EP 98922040 A EP98922040 A EP 98922040A EP 98922040 A EP98922040 A EP 98922040A EP 0976135 A1 EP0976135 A1 EP 0976135A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mol percent
- resistor
- aluminum
- additional metal
- resistors
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C3/00—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids
Definitions
- the present invention relates to resistors adapted for use in electrical circuits and formed of aluminum-titanium alloys.
- Heavy duty power resistors are commonly employed in electrical circuits to control electrical current flow by converting electrical energy to heat, which may then be dissipated into the surrounding environment. Normally, resistors rated at 300
- power resistors typically have been made from nickel-chromium alloys (NiChromes), copper-nickel alloys (Cu-Ni) or stainless steel alloys, with FeCrAl, 304 and 430 being the most common stainless steel types.
- Stainless steel is often modified with additional metals to improve its electrical characteristics, for example, resistivity and changes in resistivity levels over an operating temperature range. While all of these materials may be used in high temperature applications, i.e. up to about 1000°C, they all have one or more shortcomings which compromise their use.
- the nickel-chromium alloys commonly referred to NiChrome materials are expensive and heavy, both of which factors limit their use in a wide range of applications.
- the copper-nickel alloys are expensive and exhibit relatively low working temperatures and melting points.
- the copper-nickel alloys are disadvantageous in that they are not readily available in sheet form.
- the stainless steel alloys also exhibit a relatively low resistivity and typically the resistivities of these alloys vary substantially over a temperature range, thereby rendering the alloys unsuitable for applications requiring precise resistivity
- the type 430 stainless steel which is commonly employed is slightly magnetic and therefore unsuitable for low inductance applications.
- Various modified forms of stainless steel are also slightly magnetic and therefore unsuitable for low inductance applications.
- These modified stainless steel alloys are also typically more expensive and therefore not attractive for widespread use.
- the resistors are formed of an alloy comprising from about 50 to 95 mol percent aluminum, from about 5 to about
- the resistors according to the present invention are strong, lightweight and non-magnetic. Additionally, the resistors according to the present invention exhibit nearly constant resistivity over a wide operating temperature range. The alloys from which the resistors are formed exhibit a good combination of ductility, material density and melting point to allow
- the Figure sets forth resistivity measurements for various resistors according to the present invention over a temperature range of from about 25 °C to 600°C, as described in further detail herein.
- the resistors according to the present invention are adapted for use in an electrical circuit and may be formed of any conventional resistor structure. As known in the art, resistors are employed to control current flow in an electrical circuit. Preferably, the resistor will include connectors for facilitating connection of the resistor into an electrical circuit in a conventional manner.
- the resistors of the present invention are suitable for use in a variety of applications, including heavy duty environments requiring resistors rated at 10 watts and above.
- the resistors according to the present invention are formed of an alloy which comprises from about 50 to about 95 mol percent aluminum, from about 5 to about 50 mol percent titanium and up to about 15 mol percent of at least one additional metal
- aluminum-titanium alloys from which the present resistors are formed provide lightweight yet strong resistors. Additionally, the combination of ductility, resistivity, density and melting point exhibited by these alloys facilitates formation of the alloys into resistors of desired shapes and sizes, particularly when the alloys comprise at least one additional metal or a combination of additional metals in an amount up to about 15 mol percent. Additionally, the alloys from which the present resistors are formed exhibit good corrosion resistance without disadvantageous ⁇ effecting the resistivity properties.
- the resistors according to the present invention are
- the resistors according to the present invention are formed from an alloy comprising from about 65 to about 70 mol percent aluminum, from about 20 to about 30 mol percent titanium and from about 5 to about 10 mol percent of at least one additional metal.
- the at least one additional metal comprises one or more transition metals of groups IB-VIIB or group VIII, although other metals, for example, boron, may be employed, alone or in combination with one or more transition metals.
- the additional metal is selected from the group consisting of copper, manganese, iron,
- the alloys chromium, vanadium, nickel, boron, and mixtures thereof.
- the alloys chromium, vanadium, nickel, boron, and mixtures thereof.
- the alloys from which the resistors of the present invention are formed may themselves be formed in accordance with conventional metal alloying techniques.
- the alloys may be formed to resistors in accordance with techniques known in the art and particularly processing such as annealing, pressing, cutting, drilling and the like are facilitated with the alloys according to the present invention, particularly wherein at least one additional metal is included in the aluminum-titanium
- Example 1 various aluminum-titanium alloys are formed and subjected to measurement of Vickers hardness according to ASTM-E92 using a load of 200 gf.
- the approximate molar composition and hardness of each alloy is set forth in Table 1.
- the hardness value for each allow is presented as an average of six measured values.
- the alloys were formed as resistors, inserted into an electrical circuit and subjected to measurement of resistivity over a temperature range of from ambient to about 600°C according to the four probe technique known in the art.
- the area and length of each resistor sample subjected to measurement is set forth in Table 2, and the results of the resistivity measurements are set forth in the Figure.
- the Figure also provides
- resistors according to the present invention generally exhibit consistent resistivity over wide temperature ranges and at a variety of levels, thereby demonstrating that the resistors according to the present invention are suitable for use in a variety of applications, including precision
- the resistivities according to the invention vary by not more than about 50%, more preferably by not more than about 30%, and even more preferably by not more than about 10%), over a temperature range of from about 25°C to about 600°C. Additionally, the non-magnetic, lightweight, corrosion resistance and strength characteristics of the resistors according to the present invention contribute to their
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Non-Adjustable Resistors (AREA)
- Conductive Materials (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US4463097P | 1997-04-18 | 1997-04-18 | |
US44630P | 1997-04-18 | ||
PCT/US1998/007794 WO1998048431A1 (en) | 1997-04-18 | 1998-04-17 | Resistors formed of aluminum-titanium alloys |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0976135A1 true EP0976135A1 (en) | 2000-02-02 |
Family
ID=21933429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98922040A Withdrawn EP0976135A1 (en) | 1997-04-18 | 1998-04-17 | Resistors formed of aluminum-titanium alloys |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0976135A1 (en) |
AU (1) | AU7467298A (en) |
WO (1) | WO1998048431A1 (en) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1124104B (en) * | 1979-06-13 | 1986-05-07 | Fusani Giovanni | ALUMINUM IRON ALLOYS INTENDED MAINLY BUT NOT EXCLUSIVELY FOR THE MANUFACTURE OF ELEMENTS FOR RESISTORS IN GENERAL AND IN PARTICULAR FOR STRONG CURRENTS AND PROCEDURE FOR THEIR PRODUCTION |
JPS58153752A (en) * | 1982-03-08 | 1983-09-12 | Takeshi Masumoto | Ni-cr alloy material |
JPS59118848A (en) * | 1982-12-27 | 1984-07-09 | Sumitomo Light Metal Ind Ltd | Structural aluminum alloy having improved electric resistance |
JPH0621326B2 (en) * | 1988-04-28 | 1994-03-23 | 健 増本 | High strength, heat resistant aluminum base alloy |
US5157373A (en) * | 1991-03-08 | 1992-10-20 | Post Glover Resistors, Inc. | Post glover resistor |
JPH0565584A (en) * | 1991-09-05 | 1993-03-19 | Yoshida Kogyo Kk <Ykk> | Production of high strength aluminum alloy powder |
-
1998
- 1998-04-17 EP EP98922040A patent/EP0976135A1/en not_active Withdrawn
- 1998-04-17 WO PCT/US1998/007794 patent/WO1998048431A1/en not_active Application Discontinuation
- 1998-04-17 AU AU74672/98A patent/AU7467298A/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO9848431A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1998048431A1 (en) | 1998-10-29 |
AU7467298A (en) | 1998-11-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0057935B1 (en) | Temperature sensitive amorphous magnetic alloy | |
CA2030093A1 (en) | Amorphous alloys having superior processability | |
JP3168158B2 (en) | Ni-based heat-resistant brazing material with excellent wettability and corrosion resistance | |
KR20160021195A (en) | Resistor alloy, component produced therefrom and production method therefor | |
EP0116437B1 (en) | Brazing alloy | |
JP2017053015A (en) | Resistive material | |
EP1193446B1 (en) | Glow plug | |
JP2019049048A (en) | Samarium-containing soft magnetic alloy | |
US6538554B1 (en) | Resistors formed of aluminum-titanium alloys | |
KR100803684B1 (en) | AUSTENITIC Fe-Cr-Ni ALLOYS FOR HIGH TEMPERATURE USE | |
CA2087389C (en) | Heater sheath alloy | |
WO2005081685A3 (en) | High-alloy metals reinforced by diamond-like framework and method of making the same | |
WO1998048431A1 (en) | Resistors formed of aluminum-titanium alloys | |
DE69524746D1 (en) | AUSTENITIC Ni-BASED ALLOY WITH HIGH CORROSION RESISTANCE, STABLE STRUCTURE AND GOOD WORKABILITY | |
US5006054A (en) | Low density heat resistant intermetallic alloys of the Al3 Ti type | |
US811859A (en) | Electric resistance element. | |
CA1041065A (en) | Thermometric bimetal of high strength at high temperature | |
CN1216379C (en) | Resistance material | |
EP0018818A1 (en) | Precipitation hardening copper alloys | |
JP3522821B2 (en) | bimetal | |
JPS6117895B2 (en) | ||
US5160382A (en) | Heater sheath alloy | |
GB1581280A (en) | Fe-ni-cr alloys resistant to high temperature oxidation | |
CN107201462B (en) | A kind of Cu-Ni-Fe alloys and preparation method thereof with high softening temperature | |
JPS60125347A (en) | Sintered al alloy for sliding member |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19991110 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
17Q | First examination report despatched |
Effective date: 20010712 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20030121 |