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  • 您现在的位置:首页> 外文会议>Conference on Active Materials: Behavior and Mechanics; 20060227-0302; San Diego,CA(US) >亿博帐号注册详情

    【24h】Processing of porous NiTi by spark plasma sintering method

    机译火花等离子体烧结法加工多孔NiTi

    【摘要】Intermediate porosity (25% - 40%) NiTi is processed by Spark Plasma Sintering (SPS) method. In order to increase the porosity, the SPS chamber setup is modified. A pair of spacers is added to the chamber punch setup so that the pressure applied on the powder is minimized. As a result, the porosity is increased. TiH_2 powder is added as a pore-forming reagent to the element powder mixture for sintering. The decomposition of TiH_2 increases the porosity efficiently. Two kinds of heat treatments are applied to convert the porous NiTi to superelastic grade. One is homogenization followed by aging treatment, the other is aging treatment only. It is found that homogenization heat treatment reduces the porosity. Compressive testing under both room temperature and temperature above the austenite transformation finish temperature are conducted. Porous NiTi specimens perform ductility and show clear superelestic loop with high flow stress and strain.

    【摘要机译】中间孔隙率(25%-40%)NiTi是通过火花等离子烧结(SPS)方法处理的。为了增加孔隙率,对SPS腔室设置进行了修改。在室冲头装置中添加了一对垫片,以使施加在粉末上的压力最小。结果,孔隙率增加。将TiH_2粉末作为成孔剂添加到用于烧结的元素粉末混合物中。 TiH_2的分解有效地增加了孔隙率。两种热处理方法可将多孔NiTi转变为超弹性等级。一种是均质化,然后进行时效处理,另一种是仅时效处理。发现均质化热处理降低了孔隙率。在室温和高于奥氏体转变终点温度的温度下进行压缩测试。 NiTi多孔样品表现出延展性,并显示清晰的超弹性环,具有高流动应力和应变。

    【作者】Ying Zhao;Minoru Taya;

    【作者单位】Department of Mechanical Engineering University of Washington, Box 352600 Seattle, WA 98195, U.S.A.;

    【年(卷),期】2006(),

    【年度】2006

    【页码】P.617013.1-617013.6

    【总页数】6

    【原文格式】PDF

    【正文语种】eng

    【中图分类】TB30;

    【关键词】spark plasma sintering;porous NiTi;intermediate porosity;TiH_2;

    机译 火花等离子体烧结;多孔NiTi;中孔; TiH_2;
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