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烧结温度对多孔Ti-15Al合金微观结构与性能的影响

张美丽 代卫丽 刘彦峰 韩茜

张美丽, 代卫丽, 刘彦峰, 韩茜. 烧结温度对多孔Ti-15Al合金微观结构与性能的影响[J]. 钢铁钒钛, 2022, 43(4): 55-61. doi: 10.7513/j.issn.1004-7638.2022.04.009
引用本文: 张美丽, 代卫丽, 刘彦峰, 韩茜. 烧结温度对多孔Ti-15Al合金微观结构与性能的影响[J]. 钢铁钒钛, 2022, 43(4): 55-61. doi: 10.7513/j.issn.1004-7638.2022.04.009
Zhang Meili, Dai Weili, Liu Yanfeng, Han Xi. Effect of sintering temperature on microstructure and properties of porous Ti-15Al alloy[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(4): 55-61. doi: 10.7513/j.issn.1004-7638.2022.04.009
Citation: Zhang Meili, Dai Weili, Liu Yanfeng, Han Xi. Effect of sintering temperature on microstructure and properties of porous Ti-15Al alloy[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(4): 55-61. doi: 10.7513/j.issn.1004-7638.2022.04.009

烧结温度对多孔Ti-15Al合金微观结构与性能的影响

doi: 10.7513/j.issn.1004-7638.2022.04.009
基金项目: 陕西省教育厅专项科研计划资助项目(20JK0618);商洛市科技局科学技术研究发展计划项目(2020-Z-0083);商洛市高性能有色金属制备与加工技术创新团队(SK2019-75)。
详细信息
    作者简介:

    张美丽(1985—),女,陕西商洛人,讲师,硕士,主要从事有色金属多孔材料相关研究,E-mail:283233650@qq.com

  • 中图分类号: TF823,TG146.2

Effect of sintering temperature on microstructure and properties of porous Ti-15Al alloy

  • 摘要: 以金属Ti粉和Al粉为原料,采用粉末冶金法制备多孔Ti-15Al合金材料,并研究不同的烧结温度对其物相成分、微观孔隙结构、抗压性能和耐腐蚀性能的影响。结果表明:多孔Ti-15Al合金在高温烧结后,因金属Ti和Al之间发生偏扩散和固相反应而形成了α-Ti和Ti3Al的平衡相,随着烧结温度的升高,合金中孔隙结构逐渐由长条状的贯通孔向近似球状的封闭孔转变,且孔隙率和平均孔径尺寸均呈先增大后减小的变化,在1300 ℃烧结后的孔隙率和孔径尺寸最小,最小值分别为11.6%和13.8 μm;因材料孔隙结构的转变,导致多孔Ti-15Al合金的抗压强度和耐腐蚀性能均随烧结温度的升高先增大后减小,烧结温度为1300 ℃时的抗压强度和耐腐蚀性能最好,最大抗压强度为79 MPa,最小腐蚀电流密度为2.05×10−7 A/cm2
  • 图  1  多孔Ti-15Al合金的烧结工艺曲线

    Figure  1.  Sintering process curve of the porous Ti-15Al alloys

    图  2  多孔Ti-15Al合金的XRD图谱

    Figure  2.  XRD patterns of the porous Ti-15Al alloys

    图  3  Ti-Al二元合金相图[1]

    Figure  3.  Binary phase diagram of Ti-Al alloy

    图  4  不同烧结温度的多孔Ti-15Al合金显微组织

    Figure  4.  Microstructure of the porous Ti-15Al alloys at different sintering temperatures

    图  5  不同烧结温度的多孔Ti-15Al合金孔隙形貌

    Figure  5.  The pore morphology of the porous Ti-15Al alloys at different sintering temperatures

    图  6  多孔Ti-15Al合金的径向收缩率

    Figure  6.  Radial shrinkage of the porous Ti-15Al alloys

    图  7  多孔Ti-15Al合金的压缩载荷-位移曲线

    Figure  7.  Compressive load-displacement curves of the porous Ti-15Al alloys

    图  8  多孔Ti-15Al合金的抗压强度

    Figure  8.  Compressive strength of the porous Ti-15Al alloys

    图  9  多孔Ti-15Al合金的阳极极化曲线

    Figure  9.  Anodic polarization curves of the porous Ti-15Al alloys

    表  1  Ti粉的化学成分

    Table  1.   Chemical composition of Ti powder %

    CHONFeMnMgSiTi
    0.0130.0220.280.0090.028<0.01<0.010.02Bal.
    下载: 导出CSV

    表  2  Al粉的化学成分

    Table  2.   Chemical composition of Al powder %

    SiFeCuZnTiMnMgSiAl
    0.450.50.050.0090.028<0.01<0.010.02Bal.
    下载: 导出CSV

    表  3  多孔Ti-15Al合金的孔隙率和平均孔径

    Table  3.   Porosity and average pore size of the porous Ti-15Al alloys

    烧结温度/℃孔隙率/%平均孔径/μm
    110022.225.1
    120019.116.5
    130011.613.8
    140014.325.8
    下载: 导出CSV

    表  4  多孔Ti-15Al合金的自腐蚀电位和自腐蚀电流密度

    Table  4.   Self-corrosion potential and current density of the porous Ti-15Al alloys

    烧结温度/℃腐蚀电位/V电流密度/(A·cm−2)
    1100−0.442.38×10−6
    1200−0.142.73×10−7
    1300−0.042.05×10−7
    1400−0.086.04×10−7
    下载: 导出CSV
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  • 收稿日期:  2022-03-14
  • 刊出日期:  2022-09-14

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