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凝膠注模工藝制備醫(yī)用多孔Ti-Co合金的性能
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國家自然科學基金（50774010）；國家教育部回國人員科研啟動基金項目


Mechanical Properties of Porous Ti-Co Alloy for Medical Application by Gelcasting
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    摘要:

    采用凝膠注模工藝制備含8%和12%Co（質(zhì)量分數(shù)，下同）的多孔Ti-Co合金，研究獲得均勻懸浮穩(wěn)定漿料的分散劑加入量。采用掃描電子顯微鏡、X射線衍射、壓縮和三點彎曲試驗分別對多孔Ti-Co合金的顯微結(jié)構(gòu)和力學性能進行了測試和分析。結(jié)果表明，加入1%分散劑可獲得分散效果最佳的懸浮漿料，所制備多孔Ti-Co合金的孔隙率在50%左右，孔隙呈三維通孔結(jié)構(gòu)。與多孔純鈦相比，添加Co元素明顯提高了多孔Ti的力學性能，其中壓縮強度在68~378 MPa之間，抗彎曲強度在53.68~169.17 MPa之間，彈性模量在7~21 GPa之間。固相體積分數(shù)為33%，在1100 ℃下燒結(jié)的多孔Ti-8%Co合金由于與成人骨的力學相容性最好，適合作為醫(yī)用植入材料。

    Abstract:

    Porous titanium based alloys containing 8 wt% and 12 wt% cobalt elements were prepared by gelcasting methods. The concentration of dispersant for obtain the stable suspension slurry were studied. The microstructure, the total porosity and the mechanical properties of the sintered porous Ti-Co alloys were investigated by scaning electronic microscopy, X-ray diffraction, compression and bending tests. The results show that 1 wt% of the optimal dispersant amount is selected, at which viscosity of the suspension slurry is low. Open and closed three-dimensional pore morphologies and total porosity around 50% can be achieved. In contrast to porous Ti by gelcasting available before, porous Ti-Co alloys present excellent properties. The compressive strength ranging from 68-378 MPa, the bending strength ranging from 53.68-169.17 MPa and Young's modulus ranging from 7-21 GPa. In this study, porous Ti-8Co alloy (33 vol%) which have great properties matching adult bone, therefore being suited for medical applications.

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楊棟華,邵慧萍,郭志猛,林 濤,樊聯(lián)鵬.凝膠注模工藝制備醫(yī)用多孔Ti-Co合金的性能[J].稀有金屬材料與工程,2011,40(10):1822~1826.[Yang Donghua, Shao Huiping, Guo Zhimeng, Lin Tao, Fan Lianpeng. Mechanical Properties of Porous Ti-Co Alloy for Medical Application by Gelcasting[J]. Rare Metal Materials and Engineering,2011,40(10):1822~1826.]
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  • 收稿日期:2010-10-21
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