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首页> 外文会议>International Symposium on Eco-Materials Processing amp; Design; 20060108-11; Chengdu(CN) >Effect of Indium on the Microstructures and Mechanical Properties of Dental Gold Alloys
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Effect of Indium on the Microstructures and Mechanical Properties of Dental Gold Alloys

机译：铟对牙科金合金显微组织和力学性能的影响

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摘要

The effect of indium on the microstructures and mechanical properties of a Au-Pt-Cu alloy was investigated. The Au-Pt-Cu-xIn alloys heat-treated at 550℃ for 30 min revealed a maximum hardness value of 207 Hv, irrespective of the heat temperature and In contents. Also, the hardness of the Au-Pt-Cu-xIn alloys (x = 0.5, 1.0, 1.5, 2.0) aged at 550℃ rapidly increased with increasing aging time, and it reached an almost constant value after 30 min. The hardness of the Au-Pt-Cu-xIn alloys aged at 550℃ for 30 min increased with increasing In content until 1.5wt%, but it slightly decreased with more increasing In content. Also, a variation of the tensile strength of the alloys with In contents showed a similar trend of hardness change with In contents. Analysis of EDS and TEM revealed that the microstructure of Au-Pt-Cu-xIn alloys is composed of solid solution with fcc structure and intermetallic InPt_3 precipitate with L1_2 structure. Based on this investigation, it can be concluded that an increase in hardness of Au-Pt-Cu-xIn alloys is ascribed to a complex effect of the precipitation hardening of InPt_3 and the grain size refinement.
机译：研究了铟对Au-Pt-Cu合金的组织和力学性能的影响。不论加热温度和In含量如何，在550℃下热处理30分钟的Au-Pt-Cu-xIn合金显示的最大硬度值为207 Hv。同样，在550℃时效的Au-Pt-Cu-xIn合金（x = 0.5、1.0、1.5、2.0）的硬度随时效时间的增加而迅速增加，并且在30分钟后达到几乎恒定的值。 550℃时效30min的Au-Pt-Cu-xIn合金的硬度随In含量的增加而增加，直至1.5wt％，而随In含量的增加而略有下降。另外，In含量的合金的抗拉强度的变化显示出随着In含量的硬度变化的相似趋势。 EDS和TEM分析表明，Au-Pt-Cu-xIn合金的显微组织由具有fcc结构的固溶体和具有L1_2结构的金属间InPt_3沉淀组成。根据这项研究，可以得出结论，Au-Pt-Cu-xIn合金硬度的增加归因于InPt_3沉淀硬化和晶粒细化的复杂作用。

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