Tough and dense boron carbide obtained by high-pressure (300 MPa) and low-temperature (1600°C) spark plasma sintering
Tough and dense boron carbide obtained by high-pressure (300 MPa) and low-temperature (1600°C) spark plasma sintering
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DOI：
10.2109/jcersj2.122.271
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发表时间：
2014-04
影响因子：
1.1
通讯作者：
P. Badica;S. Grasso;H. Borodianska;S. Xie;Peifeng Li;P. Tatarko;M. Reece;Y. Sakka;O. Vasylkiv-O.-Vasylk
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文献类型：
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作者：
P. Badica;S. Grasso;H. Borodianska;S. Xie;Peifeng Li;P. Tatarko;M. Reece;Y. Sakka;O. Vasylkiv-O.-Vasylk
采用高压(300 Mpa)低温(1600℃)放电等离子烧结(SPS)工艺，获得了致密的碳化硼(95%以上)。与用常规SPS(2100℃，50 MPa)烧结的样品的相应韧性值相比，这种方法导致了断裂韧性和动态韧性的改善。动态韧性是从分离式霍普金森压杆测量中提取的。根据微观结构和样品在原始B4C粉末中残留的B2O3和可用碳的非常不同的行为，可以理解结果。
Dense boron carbide (above 95%) was achieved through high pressure (300 MPa) and low temperature (1600°C) Spark Plasma Sintering (SPS). This approach resulted in improvement of fracture toughness and of dynamic toughness when compared to corresponding toughness values of the sample sintered by conventional SPS (2100°C, 50 MPa). Dynamic toughness was extracted from Split Hopkinson Pressure Bar measurements. Results are understood based on microstructure and on very different behaviour of the samples in respect to residual B2O3 and carbon available in the raw B4C powder.