NaB5C–B5/C Composite Ceramics Prepared by Reaction Sintering in Na Vapor
NaB5C–B5/C Composite Ceramics Prepared by Reaction Sintering in Na Vapor
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Na蒸气反应烧结制备NaB5C–B5/C复合陶瓷
DOI：
10.1111/jace.14204
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
H. Yamane
中科院分区：
文献类型：
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作者：
H. Morito;Takuma Kimura;H. Yamane
通过在1173 K下在Na蒸汽中加热无定形硼（B）和炭黑（C）粉末（B/C摩尔比为5/1）的混合物的压块来进行碳硼化钠（NaB_5C）的反应烧结。由用球磨机混合的B5/C粉末的压块（压块密度，1.67 Mg/m3）获得的陶瓷是NaB 5C（74质量%）和未反应的B5/C（26质量%）的复合物。复合陶瓷的体积密度为2.04 ± 0.03Mg/m3，抗弯强度为320.9 ± 10.4MPa。透射电子显微镜观察显示，B或C的纳米尺寸的非晶颗粒包含在NaB 5 C的基质中。
Reaction sintering of sodium carbaboride (NaB5C) was performed by heating compacts of mixtures of amorphous boron (B) and carbon black (C) powders (B/C molar ratio, 5/1) at 1173 K in Na vapor. The ceramics obtained from the compacts of B5/C powder mixed with a ball mill (compact density, 1.67 Mg/m3) were the composites of NaB5C (74 mass%) and unreacted B5/C (26 mass%). The bulk density and bending strength of the composite ceramics were 2.04 ± 0.03 Mg/m3and 320.9 ± 10.4 MPa, respectively. Transmission electron microscope observation revealed that nanometer‐size amorphous grains of B or C were included in the matrix of NaB5C.