Eiji Niki1, Shiro Kohara1 and Kiyohiko Tatsuzawa1
1Institute for Space and Aeronautical Science, University of Tokyo, Tokyo
The sintering and some properties of iron-bonded titanium carbides were studied. Mixtures of titanium carbide and iron powders of various compositions (10, 20, 30, 40, 50, 60, 70, 80, and 90% iron by weight) were prepared by ball-milling. Linear shrinkages of compacts were observed during sintering, and the optimum sintering temperatures for each composition were determined. Then specimens were prepared by sintering at those temperatures. Some physical and mechanical properties were measured, and the transverse rupture strength and hardness were compared of the specimens in three different conditions; as sintered, quenched and tempered. Although some properties of iron-bonded titanium carbides may be inferior to those of nickel-bonded titanium carbides, the most promising caracteristic of iron-bonded titanium carbides of a higher binder content is that they are heat treatable. The effect of sulphur on the rupture strength of cermets were examined, but no satisfactory result was obtained.
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