Method of producing titanium carbide (TiC) based cermets through

Details Method of producing titanium carbide (TiC) based cermets through Method of producing titanium carbide (TiC) based cermets through

1999-05-28

2000-10-03

Jenkins, Daniel J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Powder pretreatment

419 11, 419 17, 419 55, B22F 312, B22F 100

Patent

active

061268968

ABSTRACT:
A method of making TiC based cermets through a reaction milling process is disclosed. In the method of this invention, a particle mixture, consisting of 50-95 wt. % Ti-C particles, with Ti particles being mixed with C particles at a weight ratio of 4:1, and 5-50 wt. % Ni particles, is reaction-milled in a Spex mill, thus making TiC based particles. A preform is formed of the TiC based particles and is sintered, thus making a TiC based cermet. The Ni particles of the particle mixture may be substituted with Ni-Mo particles. In addition, the method may further comprise the steps of presintering the preform from the forming step, and intermediate-machining the presintered preform prior to finally sintering the preform, thus machining the preform more precisely. The sintering temperature preferably ranges from 1,300.degree. C. to 1,400.degree. C. In the method of this invention, the TiC particles are made through the reaction milling process, thus reducing the production cost while making the TiC based cermets. The size of TiC particles is very fine, and so the resulting cermets preferably have both a high degree of hardness and a high degree of toughness.

REFERENCES:
patent: 4891341 (1990-01-01), Cutler et al.

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