The effect of addition nano boron carbide on the mechanical properties and pressurless sintering of B4C-5% vol TiB2 composites

Subject Areas :

Nahid Ahmadi ¹ , Hamaidreza Baharvandi ² , Naser Ehsani ³

1 - دانشجوی کارشناسی ارشد، مجتمع مواد و فناوری‌های ساخت، دانشگاه صنعتی مالک اشتر، تهران، ایران
2 - استادیار، مجتمع مواد و فناوری‌های ساخت، دانشگاه صنعتی مالک اشتر، تهران، ایران
3 - دانشیار، مجتمع مواد و فناوری‌های ساخت، دانشگاه صنعتی مالک اشتر، تهران، ایران

Received: 2016-12-24 Accepted : 2016-12-24 Published : 2016-11-21

Keywords: Mechanical Properties, Microstructure, Boron Carbide, pressurless Sintering,

Abstract :

In this study the effect of the addition of nano boron carbide on mechanical properties and sintering behavior of B 4 C-TiB 2 composite has been investigated. 0, 7, 14 and 20 wt% nano boron carbide were added to the starting powder and sintered by pressurless sintering at 2200 ° C. Under the experimental conditions of this study, the maximum properties of boron carbide composite with 20 wt% nano boron carbide was obtained so that the relative density equal to 97/2 %, micro- hardness was 31/9 GPa, and fracture toughness was 3/59 MPa.m 1/2 .

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