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    Evaluation of the Potential of the Ternary Aluminides in Nb-Ti-Al system for Hiyh Temperature Application

    陳國良 孫祖慶 謝錫善 姚可夫 任允蓉 楊王玥

    陳國良, 孫祖慶, 謝錫善, 姚可夫, 任允蓉, 楊王玥. Evaluation of the Potential of the Ternary Aluminides in Nb-Ti-Al system for Hiyh Temperature Application[J]. 工程科學學報, 1992, 14(2): 157-167. doi: 10.13374/j.issn1001-053x.1992.02.008
    引用本文: 陳國良, 孫祖慶, 謝錫善, 姚可夫, 任允蓉, 楊王玥. Evaluation of the Potential of the Ternary Aluminides in Nb-Ti-Al system for Hiyh Temperature Application[J]. 工程科學學報, 1992, 14(2): 157-167. doi: 10.13374/j.issn1001-053x.1992.02.008
    Chen Guoliang, Sun Zuqing, Xie Xishan, Yao Kefu, Ren Yunrong, Yang Wangyue. Evaluation of the Potential of the Ternary Aluminides in Nb-Ti-Al system for Hiyh Temperature Application[J]. Chinese Journal of Engineering, 1992, 14(2): 157-167. doi: 10.13374/j.issn1001-053x.1992.02.008
    Citation: Chen Guoliang, Sun Zuqing, Xie Xishan, Yao Kefu, Ren Yunrong, Yang Wangyue. Evaluation of the Potential of the Ternary Aluminides in Nb-Ti-Al system for Hiyh Temperature Application[J]. Chinese Journal of Engineering, 1992, 14(2): 157-167. doi: 10.13374/j.issn1001-053x.1992.02.008

    Evaluation of the Potential of the Ternary Aluminides in Nb-Ti-Al system for Hiyh Temperature Application

    doi: 10.13374/j.issn1001-053x.1992.02.008

    Evaluation of the Potential of the Ternary Aluminides in Nb-Ti-Al system for Hiyh Temperature Application

    • 摘要: Being aimed to developing intermetallic base structural materials to be worked at above 1000℃, a systematic investigation has been performed of the fundamental crystallographic structure, phase constitution map, density-composition dependence, oxidation resistance and general mechanical behaviour for the ternary intermetallic alloys in the Nb-Ti-Al system. Promissing results have been obtained at the initial stage in the current program. The 1100℃ high temperature strength at the strain rate of 10-2/s and 10-5/s for the ternary compound NbTiAl3γ1) base alloys are generally much higher than that of the binary compound TiAl (γ), especially in the γ1 + α2 phase region, it is as high as twice as that of TiAl. The densities are 4.1-4.79g/cm3, depending on relative amount of the intermetallics involved and the density difference between the intermetallics. The oxidation resistance at the temperature of 900-1200℃ of the compound NbTiAl3 is relatively low but still acceptable. However, by adjusting the relative amount of constituents and adding a small amount of alloying elements it can be singnificantly improved. The room temperature brittleness remains to be solved.

       

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    • 收稿日期:  1991-10-21
    • 網絡出版日期:  2021-10-16

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