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研究了粉末冶金制备的多孔Mg-1Zn-xCa合金中Ca含量对合金孔隙度、显微组织、物相组成、抗压强度、显微硬度以及耐腐蚀性能的影响.结果表明,随着Ca含量的增加,多孔合金的孔隙度降低,抗压强度和显微硬度均是先上升然后降低.当Ca含量为2％(质量分数)时,多孔 Mg-1Zn-2Ca合金的抗压强度为35.6 MPa,显微硬度(HV)为51.2,分别比多孔Mg-1Zn合金提高46.5％和35.4％.SEM分析表明,随着Ca含量增加,多孔Mg-1Zn-2Ca合金孔壁(多孔材料基体)变得更加致密.XRD和EDS分析表明,多孔Mg-1Zn-2Ca合金由单相α-Mg固溶体组成;多孔Mg-1Zn-2.5Ca合金由α-Mg固溶体和Mg2Ca两相组成.耐腐蚀性能测试表明,多孔Mg-1Zn-xCa合金的腐蚀速率随着Ca含量的增加先降低而后略有增加,腐蚀48 h后,多孔 Mg-1Zn-2Ca合金的腐蚀速率最低为0.15 mm·a-1,耐腐蚀性达到最佳.“,”The effects of Ca content on porosity,microstructure,phase composition,compressive strength,micro-hardness and corrosion resistance of porous Mg-1Zn-xCa alloys were investigated.The results reveal that with the increase of Ca contents,the porosities of porous Mg-1Zn-xCa alloys are decreased.However,the compressive strength and micro-hardness of the alloy are increased firstly and then decreased slightly.The compressive strength and micro-hardness of porous Mg-1Zn-2Ca reach 35.6 MPa and 51.2 HV,respectively,which are 46.5％ and 35.4％ higher than those of porous Mg-1Zn alloy.SEM analysis shows that the compactness of the pore cell (porous material matrix) of porous Mg-1Zn-xCa alloy is increased with the increase of Ca contents.XRD and EDS analysis show that the porous Mg-1Zn-2Ca alloy is composed of single phase of α-Mg solid solution,and porous Mg-1Zn-2.5Ca alloy consists of two phases of α-Mg and Mg2Ca.Corrosion resistance measurement reveals that the corrosion rates of porous Mg-1Zn-xCa alloys are decreased firstly and then increased slightly by increasing in Ca content.The porous Mg-1Zn-2Ca alloy has the minimum corrosion rate of 0.15 mm · a-1 and desirable corrosion resistance with immersed in SBF for 48 h.