PENG Zijun 1, AN Di 1,2, LUO Xudong 1,2, ZHANG Guodong, XIE Zhipeng 2
(1.School of High Temperature Materials and Magnesium Resource Engineering,Liaoning University of Science and Technology,
Anshan 114051,Liaoning, China; 2. State Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China)
Abstract: In order to improve the mechanical property and the thermal shock resistance of the mullite composite, the ZrO2 fiber was introduced into the system of the mullite-SiC whisker composite which was prepared with the method of pressureless sintering in nitrogen.The result shows that introduction of ZrO2 fiber can promote the sintering of the mullite composite,and enhance the fracture toughness property and the thermal shock resistance of the mullite composite.When the addition of ZrO2 fiber was 15wt.%,the fracture toughness property of the composite that reached the highest,was 5.73MPa•m1/2,and the thermal shock resistance of the composite that was maximum value,attained 47 times.The poor sintering resulted from the overmuch addition of ZrO2 fiber has a negative performance impact of the mechanical property and the thermal shock resistance of the mullite-SiC whisker composite.
Key words: the mullite-SiC whisker composite; ZrO2 fiber; mechanical property; thermal shock resistance