Preparation and Microstructure of Porous ZrB2 Ceramics Using Reactive Spark Plasma Sintering Method
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2015年第3期
论文作者：袁辉平 李俊国 SHEN Qiang ZHANG Lianmeng
文章页码：512 - 515
摘 要：Zirconium oxide（ZrO2） and boron carbide（B4C） were added to Zr B2 raw powders to prepare Zr B2 porous ceramics by reactive spark plasma sintering（RSPS）. The reactions between Zr O2 and B4 C which produce Zr B2 and gas（such as CO and B2O3） result in pore formation. X-Ray Diffraction results indicated that the products phase was Zr B2 and the reaction was completed after the RSPS process. The porosity could be controlled by changing the ratio of synthesized Zr B2 to raw Zr B2 powders. The porosity of porous ceramics with 20 wt% and 40 wt% synthsized ZrB2 are 0.185 and 0.222, respectivly. And dense Zr B2-Si C ceramic with a porosity of 0.057 was prepared under the same conditions for comparison. The pores were homogeneously distributed within the microstructure of the porous ceramics. The results indicate a promising method for preparing porous Zr B2-based ceramics.
袁辉平1,2，李俊国1，SHEN Qiang1，ZHANG Lianmeng1
1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology2. Beijing Glass Research Institute
摘 要：Zirconium oxide（ZrO2） and boron carbide（B4C） were added to Zr B2 raw powders to prepare Zr B2 porous ceramics by reactive spark plasma sintering（RSPS）. The reactions between Zr O2 and B4 C which produce Zr B2 and gas（such as CO and B2O3） result in pore formation. X-Ray Diffraction results indicated that the products phase was Zr B2 and the reaction was completed after the RSPS process. The porosity could be controlled by changing the ratio of synthesized Zr B2 to raw Zr B2 powders. The porosity of porous ceramics with 20 wt% and 40 wt% synthsized ZrB2 are 0.185 and 0.222, respectivly. And dense Zr B2-Si C ceramic with a porosity of 0.057 was prepared under the same conditions for comparison. The pores were homogeneously distributed within the microstructure of the porous ceramics. The results indicate a promising method for preparing porous Zr B2-based ceramics.
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