The influence of yttrium isopropoxide on the mechanical properties of SiCw-reinforced AIN ceramics

Chen Yong-xi; Zhou Li-juan; Sun Yu-bin

doi:10.1007/BF02832615

Journal of Wuhan University of Technology Materials Science Edition ›› 2002, Vol. 17 ›› Issue (2) : 26 -29. DOI: 10.1007/BF02832615

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The influence of yttrium isopropoxide on the mechanical properties of SiC_w-reinforced AIN ceramics

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Abstract

By using self-made metal-alkoxide yttrium isopropoxide as a sintering additive and disperser of whisker, the SiC whisker reinforced AlN ceramics was prepared. Its apparent density is 99.5 percent of the theoretical density; its flexural strength and fracture toughness are 681 MPa and 5.21 MPa·m^1/2 respectively. Comparing the result with that by applying Y₂O₃ powder as a sintering additive, the flexural strength is increased by 25% and the fracture toughness is increased by 33%. The dispersity of whisker by increased yttrium isopropoxide is significantly better than that by Triton X-100.

Keywords

aluminium nitride ceramics / yttrium isopropoxide / SiC whisker reinforcement / dispersion stability of Y(OC₃H₇)₃

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Chen Yong-xi, Zhou Li-juan, Sun Yu-bin. The influence of yttrium isopropoxide on the mechanical properties of SiC_w-reinforced AIN ceramics. Journal of Wuhan University of Technology Materials Science Edition, 2002, 17(2): 26-29 DOI:10.1007/BF02832615

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