炭化チタンウイスカー/アルミナ系複合体の機械的特性と切削性能

概要

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Composite ceramics of alumina mixed with up to 50 vol % titanium carbide whiskers were fabricated by hot-pressing at 1600℃ under 30 MPa for 30 min. The mechanical properties and the cutting performance for cast iron or carbon steel of the hot-pressed bodies were studied. Dense composites with relative densities above 98% were obtained at whisker content with up to 40 vol % . The composite containing 20 vol % whiskers showed the highest bending strength of around 560 MPa. Increasing whisker content decreased the elastic modulus, but increased the Vickers hardness and the fracture toughness. The composite mixed with 20 vol % or 30 vol % titanium carbide whiskers was found to be capable of having the cutting performance similar to the available ceramic composite cutting tools such as titanium carbide particle/alumina composite and silicon carbide whisker/alumina composite.
社団法人日本セラミックス協会の論文
1996-05-01