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ÌâÄ¿¸øÄã²é³öÀ´ÁË£¬ÎÒÕâÀïϲ»ÁËÈ«ÎÄ Sintering and mechanical properties of ¦Â-wollastonite ÆÚ¿¯ Journal of Materials Science ³ö°æÉç Springer Netherlands ISSN 0022-2461 (Print) 1573-4803 (Online) ÆÚ Volume 29, Number 6 / 1994Äê1Ô ÎÄÕÂÀàÐÍ Papers DOI 10.1007/BF00368916 Ò³ 1501-1506 Subject Collection »¯Ñ§ºÍ²ÄÁÏ¿ÆÑ§ SpringerLink Date 2004Äê11ÔÂ5ÈÕ Papers Sintering and mechanical properties of beta-wollastonite T. Endo1, S. Sugiura1, M. Sakamaki1, H. Takizawa1 and M. Shimada1 (1) Department of Molecular Chemistry and Engineering, Faculty of Engineering, Tohoku University, Aoba, Aoba-ku, Sendai City, 980 Miyagi, Japan Received: 16 September 1992 Accepted: 27 September 1993 Abstract Detailed microstructural studies have been carried out on porous beta-wollastonite (CaSiO3) ceramics with 40¨C60% of the theoretical density. Xonotlite (Ca6Si6O17(OH)2) was used as starting material, and the reaction and sintering behaviour were systematically examined in the range 800¨C1200 ¡ãC in air. Analysis of the mechanical properties showed that the strength degradation of beta-wollastonite ceramics was certainly induced by the change of microstructure. Isothermal annealing at 1100 ¡ãC, however, did not preferentially affect the microstructure or the mechanical properties of sintered beta-wollastonite. These observations lead to the conclusion that the measured bending strength and Vickers hardness of porous beta-wollastonite ceramics can be substantially modified and improved by controlling the microstructure, in particular due to the shape of randomly oriented grains in the matrix. |
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