期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 574, 期 -, 页码 504-511出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2013.05.102
关键词
Stabilizer; Response surface methodology; Sintering; Natural baddeleyite
资金
- International Science & Technology Cooperation Program of China [2012DFA70570]
- Yunnan Provincial International Cooperative Program [2011IA004]
Response surface methodology (RSM) was successfully applied to process of preparation calcia partially stabilized zirconia (CaO-PSZ). Besides that, natural baddeleyite was used as starting materials instead of chemical pure zirconia. The pressureless sintering process was optimized by the application of RSM. The independent variables, which had been found as the most effective variables on the relative density and bending strength by screening experiments, were determined as holding time, sintering temperature and heating rate. Two quadratic models were developed through RSM in terms of related independent variables to describe the relative density and bending strength as the responses. Based on contour plots and variance analysis, optimum operational conditions for maximizing relative density and bending strength, at cooling rate of 3 degrees C/min, were 1540 degrees C of sintering temperature, 5 h of holding time and heating rate of 3 degrees C/min to obtain 98.57% for relative density and 165.72 MPa for bending strength. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
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