GB1088669A - Improvements in high strength refractory filaments - Google Patents
Improvements in high strength refractory filamentsInfo
- Publication number
- GB1088669A GB1088669A GB19124/66A GB1912466A GB1088669A GB 1088669 A GB1088669 A GB 1088669A GB 19124/66 A GB19124/66 A GB 19124/66A GB 1912466 A GB1912466 A GB 1912466A GB 1088669 A GB1088669 A GB 1088669A
- Authority
- GB
- United Kingdom
- Prior art keywords
- boron
- substrate
- filaments
- filament
- atmosphere
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/5805—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on borides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62227—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining fibres
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/53—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone involving the removal of at least part of the materials of the treated article, e.g. etching, drying of hardened concrete
- C04B41/5338—Etching
- C04B41/5353—Wet etching, e.g. with etchants dissolved in organic solvents
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/56—After-treatment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
- Y10S264/19—Inorganic fiber
Abstract
Boron is coated on to an elongated substrate, e.g. a filament or ribbon, by-passing the substrate at a substantially constant speed through an ambient gaseous composition containing a vaporizable compound of boron whilst maintaining the substrate at a temperature effective to cause decomposition of the atmosphere and cause deposition of the boron on the filament. The ambient atmosphere may consist of a mixture of a boron halide e.g. BCl3 + H2, and at least a portion of the substrate is maintained at a temperature in the range 1100 DEG K to 1600 DEG K but below the melting points of both boron and the substrate. Boranes e.g. B2H6 may also be used in the ambient atmosphere, and are particularly suitable when the substrate is of a lower melting point e.g. Al. The speed of the substrate through the deposition zone is adjusted so as to obtain a deposit of the desired thickness. Possible substrates are tungsten, rhenium, tantalum, titanium, molybdenum, iron, copper, nickel, "Nichrome" (Registered Trade Mark) aluminium, magnesium, carbon and graphite. X-ray diffraction data indicate that in the above described method the deposited boron reacts with the substrate to give a boride, e.g. with tungsten WB4 or W2B5. Filaments may be subjected to zone melting to render monocrystalline, and may be treated with HNO3 (see Division C1) to increase the tensile strength of these boron-containing filaments.ALSO:The strength of boron-containing filaments is increased when such filaments are treated with aqueous nitric acid. The filament are preferably treated until 0.5 mil has been removed from the surface of the filament and the preferred acid has a concentration of 40 to 45% by weight and is used at a temperature of approximately 100 DEG C. The tensile strength of the treated filaments is at least 500,000 lb./sq. inch. The filaments are prepared as described in U.K. Specification 1,051,883 by passing an elongated substrate at substantially constant speed through an ambient gaseous atmosphere containing a vaporizable boron compound, e.g. BCl3, B2H6 while maintaining at least part of the substrate at a temperature sufficient to decompose the boron compound and deposit boron on the substrate. The atmosphere may also contain hydrogen. Suitable substrates are given as W, Re, Ta, Ti, Mo, Fe, Cu, Ni, Al, Mg, C and graphite. X-ray diffraction data indicate that when boron is deposited by the stated method it combines with the substrate to form a compound, e.g. tungsten boride WB4 or W2B5.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US45316065A | 1965-05-04 | 1965-05-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1088669A true GB1088669A (en) | 1967-10-25 |
Family
ID=23799412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19124/66A Expired GB1088669A (en) | 1965-05-04 | 1966-05-02 | Improvements in high strength refractory filaments |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3446682A (en) |
| BE (1) | BE680427A (en) |
| DE (1) | DE1546044A1 (en) |
| GB (1) | GB1088669A (en) |
| LU (1) | LU51013A1 (en) |
| NL (1) | NL6605997A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4820559A (en) * | 1983-08-01 | 1989-04-11 | Minnesota Mining And Manufacturing Company | Graphics transfer medium |
| US4770732A (en) * | 1983-08-01 | 1988-09-13 | Minnesota Mining And Manufacturing Company | Transfer method for applying graphics to a display surface |
| EP0198189B1 (en) * | 1985-04-18 | 1990-12-05 | Galileo Electro-Optics Corporation | Process for removing a surface layer from a fluoride glass |
| DE102005062392A1 (en) * | 2005-07-10 | 2007-01-11 | Ip2H Ag | Light source, a filament and a method for producing a monocrystalline metal wire |
| US8460777B2 (en) * | 2008-10-07 | 2013-06-11 | Alliant Techsystems Inc. | Multifunctional radiation-hardened laminate |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2839367A (en) * | 1957-04-09 | 1958-06-17 | American Potash & Chem Corp | Preparation of crystalline boron |
-
1965
- 1965-05-04 US US453160A patent/US3446682A/en not_active Expired - Lifetime
-
1966
- 1966-05-02 GB GB19124/66A patent/GB1088669A/en not_active Expired
- 1966-05-03 DE DE19661546044 patent/DE1546044A1/en active Pending
- 1966-05-03 NL NL6605997A patent/NL6605997A/xx unknown
- 1966-05-03 LU LU51013A patent/LU51013A1/xx unknown
- 1966-05-03 BE BE680427D patent/BE680427A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US3446682A (en) | 1969-05-27 |
| BE680427A (en) | 1966-10-17 |
| LU51013A1 (en) | 1966-07-04 |
| DE1546044A1 (en) | 1970-11-12 |
| NL6605997A (en) | 1966-11-07 |
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