Wear-Resistance Performance of ZA-27 Alloys Reinforced by Rare Earth Compounds
来源期刊：JOURNAL OF RARE EARTHS2000年第1期
论文作者：Song Wei ZHAO Hao-feng ZHAO Pei-lian
Key words：rare earths; complex compound; ZA-27 alloy;
Abstract: The morphology of ZA-27 alloy reinforced by RE compounds and its wear-resistance were studied. It is found that some nodular second phases appear due to the addition of Si and RE, which can disperse in grain boundaries or between dendrite crystals so that the alloy has been refined. Energy spectrum analysis of scanning electron microscope shows that the second phases are complex compounds containing RE, Al, Zn and Si. The micro-hardness test indicates that micro-hardness values of the compounds are higher than those of the matrix. The wear-resistance of ZA-27 alloy reinforced by RE compounds is 4 times as high as that of ZA-27 alloy and also higher than that of ZA-27 alloy containing Si phase. The impact toughness of the alloy containing RE and Si is higher than that of the alloy containing Si.
Song Wei1，ZHAO Hao-feng1，ZHAO Pei-lian1
(1.Department of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China)
Abstract:The morphology of ZA-27 alloy reinforced by RE compounds and its wear-resistance were studied. It is found that some nodular second phases appear due to the addition of Si and RE, which can disperse in grain boundaries or between dendrite crystals so that the alloy has been refined. Energy spectrum analysis of scanning electron microscope shows that the second phases are complex compounds containing RE, Al, Zn and Si. The micro-hardness test indicates that micro-hardness values of the compounds are higher than those of the matrix. The wear-resistance of ZA-27 alloy reinforced by RE compounds is 4 times as high as that of ZA-27 alloy and also higher than that of ZA-27 alloy containing Si phase. The impact toughness of the alloy containing RE and Si is higher than that of the alloy containing Si.
Key words:rare earths; complex compound; ZA-27 alloy;
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