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	A/sub 15/-Nb/sub 3/Al/B2 laminated-structure intermetallic composites produced by laser deposition
	Zhong Min-lin ; He Jin-jiang ; Liu Wen-jin ; Zhang Hong-jun ; Hao Qian
	2010-05-10 ; 2010-05-10
关键词	Practical Experimental/ aluminium alloys composite materials laminates laser deposition microhardness niobium alloys titanium alloys yield strength/ laminated-structure intermetallic composite laser deposition niobium-based intemetallic composite high temperature structural material B2 structure tough alloy coating powder blends deposition technique optimization layer-by-layer deposition method element composition microhardness microstructure yield strength temperature 293 K to 298 K temperature 900 C Nb-Ti-Al/ A4262A Laser materials processing A8115 Methods of thin film deposition A8140N Fatigue, embrittlement, and fracture A8140L Deformation, plasticity and creep B4360B Laser materials processing B0520 Thin film growth and epitaxy/ temperature 2.93E+02 to 2.98E+02 K temperature 1.17315E+03 K/ NbTiAl/ss Al/ss Nb/ss Ti/ss
中文摘要	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-Nb/sub 3/ A1/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 yield strengths reach up to 1030 MPa and 301 MPa at room temperature and 900 degrees C , and the vertical yield strengths reach up to 871 MPa and 267 MPa at room temperature and 900 degrees C.
语种	中文 ; 中文
出版者	Science Press ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/24195]
专题	清华大学
推荐引用方式 GB/T 7714	Zhong Min-lin,He Jin-jiang,Liu Wen-jin,et al. A/sub 15/-Nb/sub 3/Al/B2 laminated-structure intermetallic composites produced by laser deposition[J],2010, 2010.
APA	Zhong Min-lin,He Jin-jiang,Liu Wen-jin,Zhang Hong-jun,&Hao Qian.(2010).A/sub 15/-Nb/sub 3/Al/B2 laminated-structure intermetallic composites produced by laser deposition..
MLA	Zhong Min-lin,et al."A/sub 15/-Nb/sub 3/Al/B2 laminated-structure intermetallic composites produced by laser deposition".(2010).

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