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《Failure Analysis and Prevention》 2010-01
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Analysis on Aluminizing-resistance of Al_2TiO_5/Al_2O_3 Composites

HU Yong,WANG Qi,XU Wei-ping(Dep.of Aeronautical & Mechanical Technology,Nanchang Hangkong University,Nanchang 330063,China)  
The volume fraction of Al2TiO5 has an influence on the aluminizing-resistance of Al2TiO5/Al2O3 composites.Al2TiO5/Al2O3 composites containing different volume fraction of Al2TiO5 volume,including 10%,20%,40%,60%,80%,and 90%,were soaked in aluminum liquid for 100 h respectively to test the aluminizing-resistance.To effectively analyze the aluminizing-resistance of the composites,appearance observation and microstructure examination were carried out.It is shown that the composites with φ(Al2TiO5)40% have better aluminizing-resistance,and no aluminum liquid penetrates into the composites.However,the composites with φ(Al2TiO5)20% are easily penetrated by aluminum liquid along the cracks due to the weak thermal shock resistance,which eventually causes the failure of the composites.The research is highly valuable for manufacture practice when Al2TiO5/Al2O3 composites are used as containers for aluminum liquid.
【CateGory Index】: TQ174.61
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