Preparation and Properties of Double Gradient Porous HA/Mg Composites

Yu Jingyuan; Li Qiang; Zhang Fengfeng; Sun Xudong

doi:10.15980/j.tzzz.2014.09.074

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Preparation and Properties of Double Gradient Porous HA/Mg Composites
Vol. 34, Issue 9, Pages: 990-993(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.09.074

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[1]于景媛,李强,张峰峰,孙旭东.双梯度多孔HA/Mg复合材料的制备及性能[J].特种铸造及有色合金,2014,34(09):990-993.

Yu Jingyuan, Li Qiang, Zhang Fengfeng, et al. Preparation and Properties of Double Gradient Porous HA/Mg Composites. [J]. Special Casting & Nonferrous Alloys 34(9):990-993(2014)
[1]于景媛,李强,张峰峰,孙旭东.双梯度多孔HA/Mg复合材料的制备及性能[J].特种铸造及有色合金,2014,34(09):990-993. DOI： 10.15980/j.tzzz.2014.09.074.

Yu Jingyuan, Li Qiang, Zhang Fengfeng, et al. Preparation and Properties of Double Gradient Porous HA/Mg Composites. [J]. Special Casting & Nonferrous Alloys 34(9):990-993(2014) DOI： 10.15980/j.tzzz.2014.09.074.

摘要

采用粉末冶金技术制备了孔隙和HA相均呈梯度分布的双梯度多孔HA/Mg复合材料。研究了造孔剂及HA含量与分布对复合材料孔隙度和抗压强度的影响

观察了烧结产物的显微组织

测量了复合材料的耐腐蚀性能。结果表明

随着中间层造孔剂含量的增加

双梯度多孔HA/Mg复合材料的孔隙度增加、抗压强度降低。随着表层HA含量的增加

梯度多孔HA/Mg复合材料的孔隙度升高

抗压强度降低。耐腐蚀性分析表明

随着孔隙度增加

复合材料的耐腐蚀性降低

与梯度多孔Mg材料相比

双梯度HA/Mg复合材料具有更好的耐腐蚀性能。随着表层HA含量的增加

腐蚀速率降低

溶液的pH值缓慢增加。

Abstract

Double gradient porous HA/Mg composites where both porosity and HA exhibited gradient distribution were prepared by powder metallurgy method.Effects of the content and distribution of the pore former and HA on the porosity and compressive strength of the composites were analyzed.The microstructure of the sintered composites was observed

and corrosion resistance of the composites was examined.The results show that with the increase of the pore former in the inner layer of double gradient porous Mg/HA materials

the porosity of the composites is increased and compressive strength is decreased.With the increase of the HA content in the outer layer of double gradient porous HA/Mg composites

the compressive strength of the composites is decreased and the porosity of the composites is increased.The corrosion resistance measurement shows that with the increase of the porosity

the corrosion resistance of the composites is weaken.Double gradient porous HA/Mg composites is superior to gradient porous Mg material in corrosion resistance.With the increase of HA content in the outer layer of the composites

the corrosion rate of the composites is decreased and pH of solution is increased slowly.