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http://dx.doi.org/10.6111/JKCGCT.2019.29.6.338

Microstructure and mechanical properties of B4C-SiC composites  

So, Sung Min (Korea Institute of Ceramic Engineering and Technology)
Kim, Kyoung Hun (Korea Institute of Ceramic Engineering and Technology)
Park, Joo Seok (Korea Institute of Ceramic Engineering and Technology)
Kim, Min Suk (Information Materials Lab. Materials Engineering, Inha University)
Kim, Hyung Sun (Information Materials Lab. Materials Engineering, Inha University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.29, no.6, 2019 , pp. 338-344 More about this Journal
Abstract
B4C-SiC composites were fabricated using hot press sintering method without sintering additives at 1,900~2,000℃ under a pressure of 40 MPa. The crystal phase, relative density, microstructure, and mechanical properties of B4C-SiC composites were evaluated. When B4C and SiC were uniformly dispersed in the composite, grain growth was inhibited, and a sintered body with a fine and uniform microstructure, with improved mechanical properties, was fabricated. The relative density of B4C-SiC composites sintered under 2,000℃ of temperature and 40 MPa of pressure was over 99.8 %, and the bending strength and Vicker's hardness at 50 wt% of B4C were 645 MPa and 30.6 GPa, respectively.
Keywords
$B_4C$; SiC; Composite; Hot press sintering; Microstructure; Mechanical properties;
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