Method for production of metal-based composites with oxide parti

Details Method for production of metal-based composites with oxide parti Method for production of metal-based composites with oxide parti

1996-07-05

1998-03-03

Mai, Ngoclan

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75233, 419 19, 419 23, 419 57, 419 58, 419 45, B22F 100

Patent

active

057237999

ABSTRACT:
The present invention provides metal-based composite with oxide particle dispersion and a method for producing the same.
The present invention relates to a method for producing metal-based composite with oxide particle dispersion, comprising sintering of metal-based ultrafine powders (with an average grain size of about 20 nm to 100 nm and a grain size distribution of about 5 nm to 300 nm and with the surface oxidized for handling) in vacuum, in an inert gas or in a reducing atmosphere by rapid sintering, crystallizing the ultrafine powders with a grain size of about 50 nm or less to metal oxide during sintering and simultaneously removing the oxygen on the surface of the ultrafine powders with the grain size of about 50 nm or more, and the metal-based composite with oxide particle dispersion produced according to the said method.

REFERENCES:
patent: 4619699 (1986-10-01), Petkovic-Luton et al.
patent: 4647304 (1987-03-01), Petkovic-Luton et al.
patent: 5049355 (1991-09-01), Gennari et al.
patent: 5551970 (1996-09-01), Danelia
Journal of Japan Institute of Metals, vol. 53, No. 2, pp. 221-226, 1989, Koji Hayashi, et al., "Pressure-Sintering of Iron, Cobalt, Nickel and Copper Ultrafine Powders and the Crystal Grain Size and Hardness of the Compacts".
The International Journal of Powder Metallurgy, vol. 30, No. 1, pp. 59-66, 1994, R.A. Andrievski, "Compaction and Sintering of Ultrafine Powders".

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