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机构地区:[1]天津理工大学,天津300191
出 处:《稀有金属材料与工程》2008年第12期2201-2205,共5页Rare Metal Materials and Engineering
基 金:天津市科技计划项目国际合作专项(07ZCGHHZ01300);天津高等学校科技发展基金(20060904)
摘 要:以纯镁为基体,以化学沉淀法制备的针状羟基磷灰石(HA)粉体为增强体,采用粉末冶金工艺制备了不同HA含量的HAP/Mg复合材料。对所制备复合材料的组织、物相以及在模拟体液(simulated body fluid,简称SBF)中的腐蚀行为进行了研究。结果表明:HA在烧结过程中与镁基体没有发生明显反应;HA对HA/Mg复合材料的密度、硬度及强度产生了不同程度的影响;同时HA加入可以提高复合材料在模拟体液中的抗腐蚀能力和抑制模拟体液的pH值增加,通过调整HA的体积分数可以调控复合材料的力学性能和腐蚀速率。Pure magnesium was taken as matrix and needle-like hydroxyapatite(HA) crystals prepared by a wet chemical precipitation was taken as reinforcement, pure magnesium matrix biocomposites with different HA contents were successfully fabricated by means of powder metallurgy method. The microstructures, formation phases and corrosion behavior in simulated body fluid(SBF) were studied in this paper. The results show that reaction between HA particles and pure magnesium matrix during sintering was not observed. The addition of HA has different influences on the density, hardness and tensile strength of HA/Mg composites, at the same time, the addition of HA can improve the corrosion resistance of magnesium matrix composites in SBF and restrain the increase of pH of SBE The mechanical properties and corrosion rates of HA/Mg composites can be controlled by adjusting the content of HA particles.
分 类 号:TB33[一般工业技术—材料科学与工程]
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