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姜娅玲,刘德宝,杨敏,赵越.热处理对HA/Mg-Zn-Ca生物复合材料显微组织及性能的影响[J].稀有金属材料与工程(英文),2017,46(10):3111~3116.[Jiang Yaling,Liu Debao,Yang Min and Zhao Yue.Effects of heat treatment on microstructures and properties of HA/Mg-Zn-Ca biocomposite[J].Rare Metal Materials and Engineering,2017,46(10):3111~3116.]
Effects of heat treatment on microstructures and properties of HA/Mg-Zn-Ca biocomposite
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Received:July 12, 2016  Revised:November 17, 2016
DOI:
Key words: composite  heat treatment  microstructure  mechanical properties  corrosion resistance
Foundation item:国家自然科学基金资助(51271131),天津市科技支撑重点项目(15ZCZDSY00920)及天津市科技特派员项目
Author NameAffiliation
Jiang Yaling,Liu Debao,Yang Min and Zhao Yue  
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Abstract:
      Magnesium and magnesium alloys have attracted increasing attention as implant materials due to their suitable mechanical properties with bones, good biocompatibility and biodegradability in physiological environment. The addition of bioceramic particles into magnesium alloy can adjust mechanical properties as well as the corrosion properties to meet the requirements service performance. In this paper, 1HA/Mg-3Zn-0.2Ca composities were fabricated by means of melt high shearing technology combined with following hot extrusion. Effects of heat treatment on microstructures, mechanical and corrosion resistance properties were investigated. The results indicated that after solid solution treatment (T4 treatment), the amounts of secondary phases in 1HA/Mg-3Zn-0.2Ca composite decreases, grain size became larger, yield strength decreased, the elongation and the corrosion resistance increased. However, the corrosion resistance show a decreasing trend as the solid solution treatment time exceeded 3h , which was attributed to grain size is overlarge. Aging treatment after solid solution, the yield strength increased and the corrosion resistance was not changed obviously. Hence, the as-extruded 1HA/Mg-3Zn-0.2Ca composite can be improved the corrosion resistance and elongation by suitable solid solution and aging heat treatment.
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