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,2017,46(10):3111~3116.[Jiang Yaling,Liu Debao,Yang Min,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.]
热处理对HA/Mg-Zn-Ca生物复合材料显微组织及性能的影响
投稿时间:2016-07-12  修订日期:2016-11-17
中文关键词:  复合材料,热处理,显微组织,力学性能,腐蚀行为
基金项目: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
中文摘要:
      镁及镁合金具有良好的生物相容性、与人骨相近的力学性能及生物可降解性。通过在镁合金基础上添加生物陶瓷颗粒可以调控复合材料的力学及腐蚀降解性能,满足不同服役情况的需求。本文采用剪切搅拌铸造结合热挤压工艺制备了1HA/Mg-3Zn-0.2Ca(wt.%)复合材料,研究了固溶及时效处理对挤压态1HA/Mg-3Zn-0.2Ca复合材料显微组织、力学性能及电化学腐蚀行为的影响。结果表明:挤压态复合材料经T4固溶处理后,第二相数量减少,晶粒尺寸增大,屈服强度降低,但延伸率和耐蚀性能有所提高。固溶超过3h后,耐蚀能力由于晶粒尺寸过分长大又出现下降;固溶后时效处理(T6),复合材料屈服强度提高,耐蚀性变化不大。因此,对挤压态HA/Mg-Zn-Ca复合材料进行适当的固溶及时效处理可以提高复合材料的耐蚀性及延伸率。
Effects of heat treatment on microstructures and properties of HA/Mg-Zn-Ca biocomposite
英文关键词:composite  heat treatment  microstructure  mechanical properties  corrosion resistance
英文摘要:
      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.
作者单位E-mail
姜娅玲 天津理工大学材料科学与工程学院 374973948@qq.com 
刘德宝 天津理工大学材料科学与工程学院 debaoliu@126.com 
杨敏 天津理工大学材料科学与工程学院  
赵越 天津理工大学材料科学与工程学院  
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