发明名称 |
Polycrystalline diamond body prodn. - by epitaxially forming diamond-graphite coat on particles and sintering at high temp. and press. |
摘要 |
<p>Prodn. of polycrystalline diamond bodies by coating individual diamond particles with graphite, and sintering a suitable shaped agglomerate under pressure whereby the graphitic domains are converted into the diamond structure. The diamond-graphite coating is formed on the particles by epitaxial deposition. The subsequent heating and compressing of the agglomerate results in the formation of a strong compact body free of graphitic inclusions. The epitaxial deposition takes place in a stream of a carbon-contg. gas. The gas stream is stopped before a purely graphitic surface layer is formed. The initial deposit has the diamond structure; then a mixed layer is formed; and finally a purely graphitic structure. These bodies withstand dynamic loading, so that they can be used as drill heads, cutting edges of metal-working tools, metal wire-drawing dies, etc. The starting material may contain even very small particles (1 mu), in contrast to the known process.</p> |
申请公布号 |
FR2327197(A1) |
申请公布日期 |
1977.05.06 |
申请号 |
FR19750030828 |
申请日期 |
1975.10.08 |
申请人 |
INSTITUT SVERKHTVERDYKH MATERIAL |
发明人 |
D. V. FEDOSEEV, B. V. DERYAGIN, V. N. BAKUL, A. I. PRIKHNA, V. P. VARNIN, S. P. VNUKOV, V. K. GERASIMENKO, J. I. NIKITIN, N. V. TSYPIN ET A. V. BOCHKO;DERYAGIN B V;BAKUL V N;PRIKHNA A I;VARNIN V P;VNUKOV S P;GERASIMENKO V K;NIKITIN J I;TSYPIN N V;BOCHKO A V |
分类号 |
B01J3/06;(IPC1-7):01B31/06;04B35/64;23P15/28;23P5/00 |
主分类号 |
B01J3/06 |
代理机构 |
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