Metal Matrix Composites: A Study of Patents, Patent by Sebastiaan A. Gieskes, Marten Terpstra (auth.), Sebastiaan

By Sebastiaan A. Gieskes, Marten Terpstra (auth.), Sebastiaan A. Gieskes, Marten Terpstra (eds.)

The current research of patents and patent purposes released within the usa, Japan and the international locations of Western Europe, and of alternative technological approximately 1980, is the results of a entire research literature released on the grounds that of records which show quite a few strategies for enhancing composite fabrics through metals, the atoms of that have been prepared in line with predetermined matrices. Pre-searches have been carried out via the Patent details workplace of TNO in Rijswijk, The Netherlands, which additionally supplied copies of the files had to perform the research. The overseas Patent class process (IPC) was once hired to figure out right entries to the records at the respective subject-matter. those periods are: C 22 C 1/09 on the subject of alloys containing steel or non-metallic fibres or filaments; through subjecting to strain and warmth an meeting comprising at /09B least one steel layer or sheet and one layer of fibres or filaments; /09C via contacting the filaments or fibres with molten steel, e. g. through impregnation; /09D by utilizing a powder-metallurgical procedure; characterised by means of the fabric used respectively for the steel /09F matrix or the reinforcing fibres; matrix shaped of a gentle steel equivalent to AI, Mg, Be, Ti; /09F2 matrix shaped of a refractory steel akin to Ni, Co, Cr, Mo. /09F4 Classifying patents or patent purposes is de facto a really tricky subject, quite while it has to accommodate methods for the creation of composites, steel alloys or pharmaceuticals.

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A higher mullite concentration results only in a small increase in bending strength. %. ullite crystalline Al z03 -SiOz' 8Al z03-SiOz and u-Al z03-SiOz fibres. f = 10 MPa). %. 21), detena1ned the optiau. % fibres. % Si. 14. (1 kg/~ = 10 MPa). % of amorphous, crystalline and 8-Al z03 respectively. 42 Fig. 12: . ) Z ~ .... ) Z .... Q Z ~ ~ 40 I 10 I 20 I 30 , 40 I 50 MULLITE CRYSTALLINE CONTENT I 60 I 70 (%) SiC. SiA Kuma M. 20), assayed the optinuM Cu and Si content for SiC and Si 31. fibre-reinforced Al eo~osites.

Et a1, (EXXON RESEARCH AID ENGINEERING CO. % SiC whiskers. The whiskers and the matrix powders are dispersed in n-butano1 or another equivalent polar solvent. The slurry is ball-milled for about 1 hr. After mixing, the mixture is dried by evaporation. The composite mixture is placed in a plastic bag on top a carbon plug in a die and the bag is cut to release the powders into the die. 01 Pa and pressing rams are installed on top of it. 3 Pa. The formed product is then heat-treated to obtain the desired product according to conventional procedures.

32 The bulk density can be varied over arange of 5-50% of the fibres. 7 MPa and post infitration pressures of 21 MPa. The fibres are fixed during the preparation of a fibre-reinforced composite by means of a binder. Donomoto T. 6)), provide a new kind of binder for preparing a composite without preheating to a temperature equal or higher than the melting point of the matrix composite. g. Si02, Zr02, Cr203 or Y203 with the consolidation material. In an exothermic reaction the added metal compound reduces, during pressure casting, the oxide.

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