Effects of Cr and Mo elements on the microstructures and compressive properties of the in situ (TiCx

来源 :自然科学进展(英文版) | 被引量 : 0次 | 上传用户:zgys200901
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In-situ (TiCxNy-TiB2)/Ni cermets with 70 wt% TiCxNy-TiB2 were successfully fabricated by combustion synthesis and hot pressing sintering in Ni-Ti-B4C-BN powder systems.The microstructures,density,compressive properties,and hardness of the TiCxNy-TiB2/Ni cermets with the addition of 0-8 wt% Cr/Mo to the Ni-Ti-B4C-BN powder systems were compared and analysed.The results showed that the ceramic particles distributed uniformly in the cermets,and the size of the ceramic particles reduced with the Cr/Mo addition.Both Cr and Mo addition can improve the hardness,compressive properties,and fracture strains of the cermets.The hardness,compressive strength,and fracture strain of the (TiCxNy-TiB2)/(Ni+Cr) cermets increased from 1561HV,2.94 GPa,and 2.9% to 1864 HV,3.65 GPa,and 3.4%,respectively when the Cr content increased to 5wt%.The hardness and compressive strength of the (TiCxNy-TiB2)/(Ni+Mo) cermets increased from 1561HV and 2.94 GPa to 1902 HV and 3.43 GPa,respectively when the Mo content increased to 8 wt%.The cermets with Cr had better compressive properties than the cermets with Mo.
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