Spark plasma sintering of LaB6-(Ti, Zr)B-2 composites
Spark plasma sintering of LaB6-(Ti, Zr)B-2 composites
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LaB6-(Ti,Zr)B-2复合材料的放电等离子烧结
DOI：
10.1080/17436753.2016.1264139
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发表时间：
2017
影响因子：
2.2
通讯作者：
Zhang J. W.
中科院分区：
文献类型：
--
作者：
Wang X.;Zhang J. X.;Yang X. Y.;Hu K.;Zhang J. W.
以LaB 6、TiB 2和ZrB 2粉末为原料，采用放电等离子烧结（SPS）技术，在40 MPa压力下于1600-1900°C保温5 min制备了LaB 6-（Ti，Zr）B2复合材料。研究了其致密化行为、显微组织和力学性能。确定了（Ti，Zr）B2的完全固溶体相。LaB 6和（Ti，Zr）B2晶粒分别呈等轴和细长状。在1900°C时获得了最高的相对密度98.43%和维氏硬度19.56GPa。在1800°C下获得了4.43 MPa m1/2的断裂韧性。
The LaB6-(Ti, Zr)B2composite was fabricated from LaB6, TiB2and ZrB2powders by spark plasma sintering (SPS) at 1600–1900°C holding for 5 min under 40 MPa. The densification behaviour, microstructure, mechanical properties were investigated. The complete solid solution phase of (Ti, Zr)B2was identified. The morphologies of LaB6and (Ti, Zr)B2grains were equiaxed and elongated, respectively. The highest relative density of 98.43% and Vickers hardness of 19.56 GPa were obtained at 1900°C. The fracture toughness of 4.43 MPa m1/2was obtained at 1800°C.