EP0108281A2
Expired / Lapsed
EP
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Silicon carbide whisker composite material with low non whisker particle content and method of manufacture thereof
Assignee: Toyota Motor Corp
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Filing: 1983-10-12
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Granted: —
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Expires: 2003-10-12
Abstract
Abstract A composite material is made from a whisker body of silicon carbide whiskers containing not more than 5% by weight of non whisker particles of diameter greater than 150 microns, with a mass of matrix metal infiltrated into the interstices of the whisker body. The matrix metal is selected from the group consisting of aluminum, magnesium, tin, copper, lead, zinc, and their alloys. The bulk density of the silicon carbide whiskers is at least 0.07 gm/cm 3 . A method is also disclosed for making this composite material, in which first a quantity of silicon carbide whiskers containing not more than 5% by weight of non whisker particles of diameter greater than 150 microns is formed into a shaped mass with a compressive strength of at least 0.5 kg/cm 2 and with a bulk density of at least 0.07 gm/cm 3 , and then this shaped mass is compounded with a quantity of the molten matrix metal by a pressure casting method. This formed mass of silicon carbide whiskers may be bound together by an inorganic binder, which may be silica, and whose volume percentage in the shaped mass of silicon carbide whiskers may desirably be less than about 25%.
Inventors
- 👤 Tadashi C/O Toyota Jidosha Kk Donomoto
- 👤 Yoshiaki C/O Toyota Jidosha Kk Tatematsu
- 👤 Atsuo C/O Toyota Jidosha Kk Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 21:51
CPC Classifications
C; C22; C22C; C22C47/00; C22C47/02; C22C47/06; C22C47/08; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/249927; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2927; Y10T428/2933; Y10T428/294; Y10T428/2958
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
101 words
A method for making a composite material, in which: first a quantity of silicon carbide whiskers containing not more than 5% by weight of non whisker particles of diameter greater than 150 microns is formed into a shaped mass with a compressive strength of at least 0.5 kg/cm 2 and with a bulk density of at least 0.07 gm/em 3 ; and then this shaped mass is compounded with a quantity of a molten matrix metal by a pressure casting method; said molten matrix metal being selected from the group consisting of aluminum, magnesium, tin, copper, lead, zinc, and their alloys.
Claim 2
Independent Claim
101 words
A method for making a composite material, in which: first a quantity of silicon carbide whiskers containing not more than 5% by weight of non whisker particles of diameter greater than 150 microns is formed into a shaped mass with a compressive strength of at least 0.5 kg/cm 2 and with a bulk density of at least 0.07 gm/em 3 ; and then this shaped mass is compounded with a quantity of a molten matrix metal by a pressure casting method; said molten matrix metal being selected from the group consisting of aluminum, magnesium, tin, copper, lead, zinc, and their alloys.
Claim 3
Dependent Claim
26 words
A method of making a composite material according to claim 1, wherein said formed mass of silicon carbide whiskers is bound together by an inorganic binder.
Claim 4
Dependent Claim
17 words
A method of making a composite material according to claim 2, wherein said inorganic binder is silica.
Claim 5
Dependent Claim
36 words
A method of making a composite material according to claim 1 wherein said shaped mass of silicon carbide whiskers contains not more than 3% by weight of non whisker particles of diameter greater thar. 150 microns.
Claim 6
Dependent Claim
36 words
A method of making a composite material according to claim 1, wherein said shaped mass of silicon carbide whiskers contains not more than 1% by weight of non whisker particles of diameter greater than. 150 microns.
Claim 7
Dependent Claim
30 words
A method of making a composite material according to claim 1, wherein the bulk density of said shaped mass of silicon carbide whiskers is at least 0.10 gm/cm 3 .
Claim 8
Dependent Claim
30 words
A method of making a composite material according to claim 1, wherein the bulk density of said shaped mass of silicon carbide whiskers is at least 0.15 gm/cm 3 .
Claim 9
Dependent Claim
38 words
A method of making a composite material according to either one of claim 2 or claim 3, wherein the volume percentage of said inorganic binder in said shaped mass of silicon carbide whiskers is less than about 25%.
Claim 10
Dependent Claim
38 words
A method of making a composite material according to either one of claim 2 or claim 3, wherein the volume percentage of said inorganic binder in said shaped mass of silicon carbide whiskers is less than about 20%.
Claim 11
Dependent Claim
30 words
A method of making a composite material according to claim 9, wherein the bulk density of said shaped mass of silicon carbide whiskers is at least 0.10 gm/cm 3 .
Claim 12
Dependent Claim
30 words
A method of making a composite material according to claim 9, wherein the bulk density of said shaped mass of silicon carbide whiskers is at least 0.15 gm/cm 3 .
Claim 13
Dependent Claim
30 words
A method of making a composite material according to claim 1, wherein the compressive strength of said -shaped mass of silicon carbide whiskers is at least 0.8 kg/em 2 .
Claim 14
Dependent Claim
79 words
A composite material comprising a whisker body of silicon carbide whiskers containing not more than 5% by weight of non whisker particles of diameter greater than 150 microns, and a mass of matrix metal infiltrated into the interstices of said whisker body, said matrix metal being selected from the group co isisting of aluminum, magnesium, tin, copper, lead, zinc, and their alloys, in which the bulk density of the silicon carbide whiskers is at least 0.07 gm/cm 3 .
Claim 15
Dependent Claim
79 words
A composite material comprising a whisker body of silicon carbide whiskers containing not more than 5% by weight of non whisker particles of diameter greater than 150 microns, and a mass of matrix metal infiltrated into the interstices of said whisker body, said matrix metal being selected from the group co isisting of aluminum, magnesium, tin, copper, lead, zinc, and their alloys, in which the bulk density of the silicon carbide whiskers is at least 0.07 gm/cm 3 .
Claim 16
Dependent Claim
28 words
A composite material according to claim 13, wherein said whisker body contains not more than 3% by weight of non whisker particles of diameter greater than 150 microns.
Claim 17
Dependent Claim
28 words
A composite material according to claim 13, wherein said whisker body contains not more than 1% by weight of non whisker particles of diameter greater than 150 microns.
Claim 18
Dependent Claim
23 words
A composite material according to claim 13, wherein the bulk density of the silicon carbide whiskers is at least 0.10 gm/cm 3 .
Claim 19
Dependent Claim
23 words
A composite material according to claim 13, wherein the bulk density of the silicon carbide whiskers is at least 0.15 gm/cm 3 .
References Cited (Backward Citations)
No citation records indexed.
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