球磨时间对Mg/HA复合材料组织与力学性能的影响
Influence of Balling Time on Microstructure and Mechanical Properties of Mg / HA Composite
王海波1, 孙青竹1, 李星逸
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作者单位：(1. 攀枝花学院 材料工程学院, 四川 攀枝花 617000; 2. 佳木斯大学 材料科学与工程学院 黑龙江省生物医学材料重点实验室, 黑龙江 佳木斯 154007)
中文关键字：复合材料； 高能球磨； 烧结
英文关键字：composite; high-energy ball milling; sintering
中文摘要：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。
英文摘要：70%Mg＋30%HA composite powder was high-energy-ball-milled under dry condition, and then the powder was cold-pressed to flake samples at 300 MPa and then was sintered at 500 ℃ for 1 h under room pressure. The compressing strength and hardness of the sintering body was measured, respectively. The fracture and surface morphology of the sintering body was observed by electronic microscopy and optical microscope. The results show that the mixed powder can be greatly refined with the increase of milling time. HA phase uniformly distributes in Mg substrate, both the compressing strength and hardness of the sintering body improve.