• Chinese Journal of Lasers
  • Vol. 34, Issue 12, 1694 (2007)
[in Chinese]*, [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
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  • [in Chinese]
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    [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese]. A15-Nb3Al/B2Laminated-Structure Intermetallic Composites Produced by Laser Deposition[J]. Chinese Journal of Lasers, 2007, 34(12): 1694 Copy Citation Text show less

    Abstract

    Niobium-based intemetallic composite is a kind of potential high temperature structural material. However, it is very brittle at room temperature. Laser deposition was used to synthesize A15-Nb3Al intemetallic brittle coating and B2 structure tough alloy coating by using Nb-12Ti-22Al and Nb-40Ti-15Al powder blends, respectively. By deposition technique optimization, the composite of the coating and layer thickness can be controlled. An A15-Nb3Al/B2 laminated-structural intermetallic composite material was then produced via layer by layer deposition method. The element composition, microstructure and microhardness of the laminated intermetallic composite show periodic variation,and gradual change at the interface between two neighboring layers. This material demonstrates good strength at room and elevated temperature. The yield strengths of laminated composites increased with the brittle/ductile layer thickness ratios. The horizontal yeild strengths reach up to 1030 MPa and 301 MPa at room temperature and 900 ℃, and the vertical yeild strengths reach up to 871 MPa and 267 MPa at room temperature and 900 ℃.
    [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese]. A15-Nb3Al/B2Laminated-Structure Intermetallic Composites Produced by Laser Deposition[J]. Chinese Journal of Lasers, 2007, 34(12): 1694
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