烧结工艺对Mg/HA复合材料力学性能及组织的影响

Effect of Sintering Process on Microstructure and Mechanical Properties of Mg/HA Composite

通过粉末冶金法制备了80%Mg+20%HA配比的复合材料,对该复合粉末进行压片烧结处理。研究了烧结工艺对该复合材料力学性能及组织的影响。结果表明:高温短时间烧结在提高材料强度方面要比低温长时间烧结效果好,在500℃下烧结1 h,制备出Mg/HA复合材料,其抗压强度最高为201.1 MPa,硬度为70.2 HV,力学性能基本可满足人体承重骨的要求。

80%Mg＋20%HA composite powders were prepared by powder metallurgy, then the powders were pressed and then sintered. The effects of sintering process on the microstructure and mechanical properties of the composite were studied. The experimental results demonstrate that high sintering-short time in increasing material strength is better than low sinteringlong time and then pressureless sintering at 500 ℃ for 1 h. The highest compressive strength of the composite prepared at 500℃ for lh is 201.1MPa, and the hardness is 70.2HV, which can meet the requirements of human bones.