摘要
采用热压烧结的方法,在不同烧结温度下对B4C微粉进行烧结,详细研究烧结温度对B4C陶瓷材料的力学性能和显微组织的影响。结果表明:B4C陶瓷材料的相对密度、抗弯强度及断裂韧性都随着烧结温度的升高先增大后减小,维氏硬度则随着烧结温度的增大而增大。采用粒度为1.5μm的B4C粉末,在1950℃热压后,材料的综合性能较好,其相对密度为99.1%、维氏硬度为32.3GPa、抗弯强度为524.6MPa、断裂韧性为6.56MPa·m1/2。
B4C ceramics were obtained using hot-pressing method. The effect of different sintering temperatures on the microstructures and mechanical properties of B4C ceramics were investigated. The results show that relative density, bending strength and fracture toughness are all increased first and then decreased with increasing the sintering temperature. The Vickers-hardness is increased with the sintering temperature increasing. When the hot-pressing sintering temperature is 1950 ℃ and the grain size of B4C powders is 1.5 μm, the B4C ceramics show the optimized properties. The values of the relative density, Vickers-hardness, bending strength and fracture toughness are 99.1%, 32.3 GPa, 524.6 MPa and 6.56 MPa·m1/2, respectively.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2011年第S1期533-535,共3页
Rare Metal Materials and Engineering
基金
国家自然科学基金(50902018)
中国博士后科学基金(20090451271)
教育部创新团队发展计划项目(IRT0713)
关键词
B4C陶瓷材料
热压烧结
力学性能
B4C ceramics material
hot-pressing
mechanical properties
