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首页> 外文期刊>Materials science & engineering >Improvement of the mechanical properties and corrosion resistance of biodegradable β-Ca_3(PO_4)2/Mg-Zn composites prepared by powder metallurgy: the adding β-Ca_3(PO_4)2, hot extrusion and aging treatment
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Improvement of the mechanical properties and corrosion resistance of biodegradable β-Ca_3(PO_4)2/Mg-Zn composites prepared by powder metallurgy: the adding β-Ca_3(PO_4)2, hot extrusion and aging treatment

机译：粉末冶金法制备可生物降解的β-Ca_3（PO_4）2 / Mg-Zn复合材料的力学性能和耐腐蚀性的改进：添加β-Ca_3（PO_4）2，热挤压和时效处理

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摘要

In this study, 10%β-Ca_3(PO_4)_2/Mg-6%Zn (wt.%) composites with Mg-6%Zn alloy as control were prepared by powder metallurgy. After hot extrusion, the as-extruded composites were aged for 72 h at 150℃. The effects of the adding β-Ca_3(PO_4)_2, hot extrusion and aging treatment on their microstructure, mechanical properties and corrosion resistance were investigated. The XRD results identified α-Mg, MgZn phase and β-Ca_3(PO_4)_2 phase in these composites. After hot extrusion, grains were significantly refined, and the larger-sized β-Ca_3(PO_4)_2 particles and coarse MgZn phases were broken into linear-distributed β-Ca_3(PO_4)_2 and MgZn phases along the extrusion direction. After aging treatment, the elements of Zn, Ca, P and 0 presented a more homogeneous distribution. The compressive strengths of the β-Ca_3(PO_4)_2/Mg-Zn composites were approximately double those of natural bone, and their densities and elastic moduli matched those of natural bone. The immersion tests and electrochemical tests revealed that the adding β-Ca_3(PO_4)_2, hot extrusion and aging treatment could promote the formation of protective corrosion product layer on the sample surface in Ringer's solution, which improved corrosion resistance of the β-Ca_3(PO_4)_2/Mg-Zn composites. The XRD results indicated that the corrosion product layer contained Mg(OH)_2, β-Ca_3(PO_4)_2 and hydroxyapatite (HA). The cytotoxicity assessments showed the as-extruded β-Ca_3(PO_4)_2/Mg-Zn composite aged for 72 h was harmless to L-929 cells. These results suggested that the β-Ca_3(PO_4)_2/Mg-Zn composites prepared by powder metallurgy were promising to be used for bone tissue engineering.
机译：本研究以粉末冶金法制备了以Mg-6％Zn为对照的10％β-Ca_3（PO_4）_2 / Mg-6％Zn（wt。％）复合材料。热挤压后，将挤压后的复合材料在150℃下老化72小时。研究了添加β-Ca_3（PO_4）_2，热挤压和时效处理对其组织，力学性能和耐蚀性的影响。 XRD结果鉴定出这些复合材料中的α-Mg，MgZn相和β-Ca_3（PO_4）_2相。热挤压后，晶粒明显细化，较大尺寸的β-Ca_3（PO_4）_2颗粒和粗MgZn相沿挤压方向破碎成线性分布的β-Ca_3（PO_4）_2和MgZn相。时效处理后，Zn，Ca，P和0的元素分布更加均匀。 β-Ca_3（PO_4）_2 / Mg-Zn复合材料的抗压强度约为天然骨的两倍，其密度和弹性模量与天然骨相匹配。浸没试验和电化学试验表明，添加β-Ca_3（PO_4）_2，热挤压和时效处理可以促进在林格氏溶液中样品表面上形成腐蚀保护层，从而提高了β-Ca_3（）的耐蚀性。 PO_4）_2 / Mg-Zn复合材料。 X射线衍射结果表明，腐蚀产物层含有Mg（OH）_2，β-Ca_3（PO_4）_2和羟基磷灰石（HA）。细胞毒性评估显示，经老化72 h的挤压β-Ca_3（PO_4）_2 / Mg-Zn复合材料对L-929细胞无害。这些结果表明，粉末冶金制备的β-Ca_3（PO_4）_2 / Mg-Zn复合材料有望用于骨组织工程。

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  • 来源
    《Materials science & engineering》 |2017年第5期|582-596|共15页
  • 作者

    Yang Yan; Yijun Kang; Ding Li; Kun Yu; Tao Xiao; Youwen Deng; Han Dai; Yilong Dai; Hanqing Xiong; Hongjie Fang;

  • 作者单位

    School of Materials Science and Engineering, Central South University, Changsha 410083, China,Department of Materials Science and Engineering, Yantai Nanshan University, Yantai 265713, China,Orthopedic Biomedical Materials Engineering Laboratory of Hunan Province, Changsha 410011, China;

    The Second Xiangya Hospital, Central South University, 410011, China,Orthopedic Biomedical Materials Engineering Laboratory of Hunan Province, Changsha 410011, China;

    School of Materials Science and Engineering, Central South University, Changsha 410083, China,The Second Xiangya Hospital, Central South University, 410011, China,Orthopedic Biomedical Materials Engineering Laboratory of Hunan Province, Changsha 410011, China;

    School of Materials Science and Engineering, Central South University, Changsha 410083, China,Department of Materials Science and Engineering, Yantai Nanshan University, Yantai 265713, China,Orthopedic Biomedical Materials Engineering Laboratory of Hunan Province, Changsha 410011, China;

    The Second Xiangya Hospital, Central South University, 410011, China,Orthopedic Biomedical Materials Engineering Laboratory of Hunan Province, Changsha 410011, China;

    The Second Xiangya Hospital, Central South University, 410011, China,Orthopedic Biomedical Materials Engineering Laboratory of Hunan Province, Changsha 410011, China;

    Department of Materials Science and Engineering, Yantai Nanshan University, Yantai 265713, China;

    School of Materials Science and Engineering, Central South University, Changsha 410083, China,Department of Materials Science and Engineering, Yantai Nanshan University, Yantai 265713, China;

    School of Materials Science and Engineering, Central South University, Changsha 410083, China,Department of Materials Science and Engineering, Yantai Nanshan University, Yantai 265713, China;

    Department of Materials Science and Engineering, Yantai Nanshan University, Yantai 265713, China;

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  • 正文语种 eng
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  • 关键词

    β-Ca_3(PO_4)_2/Mg-Zn composite; Hot extrusion; Aging treatment; Mechanical properties; Corrosion behavior; Cytocompatibility;

    机译：β-Ca_3（PO_4）_2 / Mg-Zn复合材料;热挤压;老化处理;机械性能腐蚀行为;细胞相容性;

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