摘要
采用XRD,SEM及力学性能测试等方法研究添加稀土氧化物Y2O3、CeO2和(Y2O3+CeO2)对羟基磷灰石基复合材料的烧结温度、力学性能和显微结构的影响。结果表明,添加2%的稀土氧化物,可以降低烧结温度,改善显微结构,提高抗弯强度。尤其是添加2%的复合稀土氧化物(Y2O3+CeO2)后,羟基磷灰石基复合材料的抗弯强度达110 MPa,是未添加稀土氧化物的试样的1.29倍。其强度提高的主要原因是稀土元素的细晶强化和固溶强化等对基体的作用。
Effects of Y2O3, CeO2 and the mixture of Y2O3 and CeO2 on sintering temperature, microstructure and mechanical properties of hydroxyapatite matrix composites were studied by XRD, SEM and mechanical property test. The experimental results show that the sintering temperature decreases, the bending strength increases and the microstructure is improved adding 2% rare earth oxides in hydroxyapatite matrix composites. The bending strength of the composite added 2% mixture of Y2O3 and CeO2 is 1.29 times of that without adding rare earth oxides, which is because that the rare earth oxides added in hydroxyapatite matrix composites can contribute to the strengthening by the refinement of grain size and solution strengthening.
出处
《粉末冶金材料科学与工程》
EI
北大核心
2012年第6期774-778,共5页
Materials Science and Engineering of Powder Metallurgy
基金
辽宁省自然科学基金资助项目(20062193)
辽宁省专利局资助项目
