PHASE TRANSFORMATION OF ZrO2-8%Y2O3 DURING ANNEALING AT HIGH TEMPERATURE
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition1995年第1期
论文作者：潘牧 邱风襄 贾世聪 邵刚勤 罗志平
文章页码：23 - 29
摘 要：<正>In this study,coatings of zirconia alloyed with8wt% yttria were prepared by plasma spraying.A comprehensivesequence of annealing experiments comprising time from 1 to 100hours at temperatures between 1100 and 1500℃ were carried out.It is shown that the T′phase in coatings decomposes into low yttriatetragonal phase（T1′）and high yttria tetragonal phase（T2′）following high temperature annealing.The content of YO1.5in T1′decreases with the increasement of annealing time.Both T1′andT2′phases are also “non-transformable”tetragonal phases.Andfurther annealing causes a cubic phase （C） to precipitate fromT2′.The increasement of C phase is accompanied by the decrease-ment of T2′phase.The probable mechanism of T′→T1′+T2′phase transformation is of spinodal decomposition and that of T2′→C is of precipitation.
潘牧，邱风襄，贾世聪，邵刚勤，罗志平
摘 要：<正>In this study,coatings of zirconia alloyed with8wt% yttria were prepared by plasma spraying.A comprehensivesequence of annealing experiments comprising time from 1 to 100hours at temperatures between 1100 and 1500℃ were carried out.It is shown that the T′phase in coatings decomposes into low yttriatetragonal phase（T1′）and high yttria tetragonal phase（T2′）following high temperature annealing.The content of YO1.5in T1′decreases with the increasement of annealing time.Both T1′andT2′phases are also “non-transformable”tetragonal phases.Andfurther annealing causes a cubic phase （C） to precipitate fromT2′.The increasement of C phase is accompanied by the decrease-ment of T2′phase.The probable mechanism of T′→T1′+T2′phase transformation is of spinodal decomposition and that of T2′→C is of precipitation.
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