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Processing and properties of a 85%Cr3C2−10.5%Ni-4.5%Fe cermet

1997; Elsevier BV; Volume: 37; Issue: 7 Linguagem: Inglês

10.1016/s1359-6462(97)00193-0

1872-8456

S. Eroglu, Cihangir Duran,

Intermetallics and Advanced Alloy Properties

Sintering of the 85%Cr{sub 3}C{sub 2}-10.5%Ni-4.5%Fe cermet was carried out in both the solid-state (T 1,275 C) regimes. Samples sintered at temperatures above 1,275 C exhibit better density and hardness, owing to the liquid phase formed during sintering. The best mechanical properties and fine microstructures were obtained from the samples sintered at 1,300 C. Properties of solid-state sintered specimens are poorer, but improve with sintering time. Abnormal and elongated growths of carbide grains are favored by high sintering temperature and sintering time. The binder phase which is a solid solution of Ni-Fe-Cr{sub 3}C{sub 2} is distributed as separate islands in the skeleton of almost pure Cr{sub 3}C{sub 2} phase.