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OALib Journal期刊
ISSN: 2333-9721
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ha(zro2)/316l不锈钢纤维对称功能梯度生物材料
Keywords: 功能梯度材料,生物材料,羟基磷灰石
Abstract:
？制备了ha(zro2)/316l不锈钢纤维对称功能梯度材料(fgm),316l不锈钢纤维的含量(体积分数)按20%→10%→0→10%→20%呈轴向对称梯度变化.分析了材料的微观结构和微区元素含量,研究了材料的性能与316l不锈钢纤维含量的关系.结果表明,在ha(zro2)/316l不锈钢纤维对称fgm中,316l不锈钢纤维在微观上呈无序和均匀分布状态,它被包裹于ha(zro2)基体中,两者紧密结合.316l不锈钢纤维与ha(zro2)基体间的界面表现为部分凹凸不平,紧紧地咬合在一起.在fgm基体中发生了微量的韧化相fe元素扩散,在韧化相316l不锈钢纤维不发生基体相ca、p元素的扩散,基体与韧化相之间不发生化学反应.随着316l不锈钢纤维含量的增加,ha(zro2)/316l不锈钢纤维复合材料的断裂韧性和弹性模量逐渐增加,体现了fgm中各梯度层的力学性能缓和设计.按miao模型计算ha(zro2)/316l不锈钢纤维fgm中的残余热应力为515mpa,fgm的增韧机理主要为纤维的拔出增韧和层间的裂纹偏转增韧.
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