Acta Metall Sin  1989, Vol. 25 Issue (6): 136-142    DOI:

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MICROSTRUCTURE AND FRACTURE FEATURE OF ZTA-SiC_w COMPOSITE

ZHANG Jinsong;XIA Fei;LUO Chuan;CAO Lihua;ZHAO Kuanfang;HU Wanping Institute of Metal Research; Academia Sinica; Shenyang ZHANG Jinsong; Research assistant; Institute of Metal Research; Academia Sinica;Shenyang 110015

ZHANG Jinsong;XIA Fei;LUO Chuan;CAO Lihua;ZHAO Kuanfang;HU Wanping Institute of Metal Research; Academia Sinica; Shenyang ZHANG Jinsong; Research assistant; Institute of Metal Research; Academia Sinica;Shenyang 110015. MICROSTRUCTURE AND FRACTURE FEATURE OF ZTA-SiC_w COMPOSITE. Acta Metall Sin, 1989, 25(6): 136-142.

Abstract References Related Articles Recommended Metrics Download:  PDF(1848KB)  Export:  BibTeX | EndNote (RIS)       Abstract  A ZTA-SiC_W ceramic composite of room temperature strength 935-1110 MPa and fracture toughness 9.7MPa·m~(1/2) was prepared by the sol-gel process.Its microstructure and fracture feature have been examined by means of X-raydiffraction analysis and electron microscope observations. The results show that thewhiskers are well dispersed and the matrix has an obvious texture character. Betweenthe whisker and matrix, there is a great number of transcrystalline and trans-crystalline connective relation other than part of conventional polycrystalline connective ones. Certain secondary cracks closely related with local whisker groupare found on the fracture surface. It may be a new reinforcing and tougheningmechanism by whisker group, of which the whiskers in the local whisker grouparrest synergetically the crack propagation accompaning with the formation of se-condary cracks. Key words:  ceramic composite      microstructure      fracture      Received:  18 June 1989      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1989/V25/I6/136 1 Roy R. Scicnce, 1987; 238: 1664 2 Pierre A C, Uhlmann D R, Hordonneau A. Rev Int Hautes Temp Refract, 1986; 23: 29 3 Claussen N, Weisskopf K-L, Ruehle M. J Am Ceram Soc, 1986; 69: 288 4 Swab J. Ceram Eng Sci Proc, 1987; 8: 886 5 Claussen N, Petson G. J Phys (Paris) Collpque, 1986; 47: 693 6 Homeny J, Vaughn W L, Ferber M K. Am Ceram Soc Bull, 1987; 66: 333 7 Wei G C, Becher P F. Am Ceram Soc Bull, 1985; 64: 298 8 Garvie R C, Nicholson P S. 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