热处理对HA/Mg-Zn-Ca生物复合材料显微组织及性能的影响  

Effects of Heat Treatment on Microstructures and Properties of HA/Mg-Zn-Ca Biocomposite

作　　者：姜娅玲 刘德宝[1] 杨敏[1] 赵越[1] 金凤 

机构地区：[1]天津理工大学,天津300384 [2]天津赛宁生物工程技术有限公司,天津300384

出　　处：《稀有金属材料与工程》2017年第10期3111-3116,共6页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51271131);天津市科技支撑重点项目(15ZCZDSY00920);天津市科技特派员项目(16JCTPJC51300)

摘　　要：采用剪切搅拌铸造结合热挤压工艺制备了1HA/Mg-3Zn-0.2Ca(质量分数,%)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:挤压态复合材料经固溶处理(T4)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3 h后,由于晶粒尺寸过分长大耐蚀能力又出现下降;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。1HA/Mg-3Zn-0.2Ca composites（wt%） were fabricated by melt high shearing technology followed by hot extrusion. Effects of heat treatment on microstructures, mechanical properties and corrosion resistance were investigated. The results indicate that after solid solution treatment（T4 treatment）, the amount of secondary phases in 1HA/Mg-3Zn-0.2Ca composite decreases, grain size becomes larger, yield strength decreases, while the elongation and the corrosion resistance increases. However, the corrosion resistance shows a decreasing trend as the solid solution treatment time exceeds 3 h, which is attributed to overlarge grain size. After solid solution and aging treatment, the yield strength increases while the corrosion resistance does not change obviously. Hence, the corrosion resistance and elongation of the as-extruded 1HA/Mg-3Zn-0.2Ca composite can be improved by proper solid solution and aging heat treatment.

关 键 词：复合材料 热处理 显微组织 力学性能 腐蚀行为 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG166.4[金属学及工艺—金属材料]