US 4,802,524 AGranted

Method for making composite material using oxygen

AssigneeToyota Jidosha Kabushiki Kaisha

InventorTadashi Donomoto

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Abstract

A method for making a composite material. Porous reinforcing material such as fiber material is charged into a container which has an opening; then substantially all of the atmospheric air in the container and in the interstices of the reinforcing material is replaced by substantially pure oxygen; and then molten matrix metal is admitted into the container through the opening so as to infiltrate into the interstices of the reinforcing material. During this infiltration the oxygen within the container and in these interstices is absorbed by an oxidization reaction, and thus substantially all the gas present within the interstices of the reinforcing material is disposed of, thus not hampering the good infiltration of the molten matrix metal into the reinforcing material. Thus a high quality composite material is formed. The oxidization reaction may either be with the molten matrix metal itself, or with a getter element provided within the container.

Claims6

Dependent claims

A method for making a composite material, comprising the steps, performed in the specified sequence, of:

(a) charging porous reinforcing material into a tubular member having two open opposite ends;
(b) replacing substantially all of the atmospheric air occupying the space in said tubular member including the interstices of said reinforcing material by substantially pure oxygen gas by blowing oxygen gas into said tubular member from one of said open ends thereof while exhausting the air in said space from the other of said open ends thereof;
(c) closing only one of said open ends of said tubular member while substantially maintaining the conditions obtained by step (b);
(d) submerging said tubular member charged with said reinforcing material and oxygen gas into a bath of molten metal, the molten metal thereby flowing into said tubular member through said one open end thereof and filling the space in said tubular member including the interstices of said reinforcing material as the oxygen gas which has been occupying said space in said tubular member including said interstices loses its volume by reacting with the molten metal;
and
(e) taking out said tubular member from said bath of molten metal and cooling it down to solidify the molten metal in said tubular member.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/581,226Filed 23 Feb 1984 · continuation
Priority: JP 55-10565430 Jul 1980
Granted: 7 Feb 1989
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

C22C 47/025
Pretreatment of the fibres or filaments: aligning or orienting the fibres
B22D 19/14
Casting in, on, or around objects which form part of the product: the objects being filamentary or particulate in form
B22F 3/26
After-treatment of workpieces or articles: impregnating
C22C 47/068
From wires or filaments only: aligning wires