Hot-pressing of MoSi2 reinforced B4C composites

被引：48
|
作者：
Kumar, Shankar [1 ]
Sairam, K. [2 ]
Sonber, J. K. [2 ]
Murthy, T. S. R. Ch. [2 ]
Reddy, Vidhyasagar [1 ]
Rao, G. V. S. Nageswara [1 ]
Rao, T. Srinivasa [1 ]
机构：
[1] Natl Inst Technol, Dept Met & Mat Engn, Warangal, Andhra Pradesh, India
[2] Bhabha Atom Res Ctr, Mat Proc Div, Mumbai 400085, Maharashtra, India
来源：
CERAMICS INTERNATIONAL | 2014年 / 40卷 / 10期
关键词：
Hot pressing; Composites; Mechanical properties; B4C; MoSi2; BORON-CARBIDE; MECHANICAL-PROPERTIES; DENSIFICATION; MICROSTRUCTURE; OXIDATION; BEHAVIOR; PHASE;
D O I：
10.1016/j.ceramint.2014.06.135
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
This paper reports on the effect of molybdenum disilicide (MoSi2) addition on the densification and mechanical properties of boron carbide (B4C). Molybdenum disilicide powder (10 and 30 wt%) was added to boron carbide powder and consolidated by hot pressing at various temperatures (1700-1900 degrees C) and pressures (30-50 MPa) in 0.001 Pa vacuum. MoSi2 was found to react with B4C and form reaction products SiC, MoB2 and Mo2B5. Slight improvement in density was observed with respect to MoSi2 addition. High density compact has been obtained with 30 wt% MoSi2 at 1900 C under a pressure of 50 MPa. The hardness, elastic modulus and fracture toughness of high dense B4C+30 wt% MoSi2 compact was found to be 35.1 GPa, 555 GPa and 4.8 MPa m(1/2) (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：16099 / 16105
页数：7
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