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采用干磨方式对70%Mg+30%HA配比的复合材料进行高能球磨,随后在300 MPa下冷压成准15 mm×4 mm片状试样,用于显微组织观察与力学性能测试。然后在500℃下常压烧结1 h。实验测定了复合材料烧结体的抗压强度和硬度,通过扫描电镜和光学显微镜分别观察了压缩试样的断口形貌和烧结体的表面形貌。结果表明:随球磨时间的延长,粉末得到充分混合及细化,HA相均匀分布在Mg基体中,烧结体的抗压强度和硬度均增大。
The dry grinding method was used to ball mill the composite material with 70% Mg + 30% HA ratio and then cold-pressed at 300 MPa to a quasi-15 mm × 4 mm sheet specimen for microstructure observation and mechanical property test . Then at 500 ℃ under atmospheric pressure sintering 1 h. The compressive strength and hardness of the sintered composites were measured experimentally. The fracture morphology and the surface morphology of the sintered samples were observed by scanning electron microscopy and optical microscope respectively. The results show that with the milling time prolonging, the powder is fully mixed and refined. The HA phase is uniformly distributed in the Mg matrix, and the compressive strength and hardness of the sintered body increase.