2006•Rengong jingti xuebaoRequires access

Influence of Sintering Technique on Mechanical Properties and Microstructure of B_4C/TiB_2/Mo/C Composite

Changxia Liu

Abstract

80.6wt.%B_4C/11.6wt.%TiB_2/4.7wt%Mo/3wt.%C ceramic composite is fabricated by hot-pressing sintering and the effect of sintering temperature,holding time and pressure on mechanical properties and microstructure of the composite are analyzed.The temperature is raised from 1800℃ to 1950℃,the holding time ranges from 15min to 60min and the pressure is 30-35MPa.The strength,hardness,toughness and densification of the composite prepared by the optimized process of 1900℃ under 35MPa for 45min are 705MPa,20.6GPa,3.82MPa·m~1/2,98.2%,respectively.

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Key concepts: Materials science, Microstructure, Sintering, Composite number, Composite material, Ceramic, Fracture toughness, Toughness