NbTiAl series laminate structure intermetallic compound composite material and its preparation method

A technology of intermetallic compounds and composite materials, which is applied in the field of intermetallic compound-based composite materials, and can solve problems such as difficulty in flexible change of lamination thickness and layer thickness ratio, weak interlayer bonding strength, low room temperature yield strength and fracture toughness , achieve great design flexibility, high bonding strength between layers, solve the effects of low temperature brittleness and high temperature strength

Inactive Publication Date: 2007-05-16
TSINGHUA UNIV
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Problems solved by technology

The common features of these laminated intermetallic compound materials are non-metallurgical bonding between layers, weak interlayer bonding strength, and difficulty in flexibly changing the thickness a

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  • NbTiAl series laminate structure intermetallic compound composite material and its preparation method
  • NbTiAl series laminate structure intermetallic compound composite material and its preparation method

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[0022] The Nb-based intermetallic compound in the intermetallic composite material of the present invention is Nb with A15 structure containing NbTiAl component 3 Al intermetallic compounds are mainly, especially the intermetallic compounds containing Nb12Ti22Al, and also including the 15-structure Nb containing NbAl composition 3 Al intermetallic compound;

[0023] The ductile metal alloys in the intermetallic composite material of the present invention are mainly niobium-titanium solid solution alloys with β / B2 structure, especially Nb40Ti15Al alloys;

[0024] Figure 1 shows the stacked structure Nb 3 Macrostructure of Al / NbTiAl intermetallic composite material, which is composed of a layer of β / B2 structure NbTiAl ductile alloy layer (dark layer in Figure 1, microstructure as shown in Figure 3) superimposed a layer of brittle A15 structure Nb 3 Al intermetallic compound layer (light-colored layer in Figure 1, microstructure shown in Figure 2), and then superimposed a lay...

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Abstract

The invention relates to a laminated metal composite of NbTiAl group, and relative production, wherein said composite is formed by one layer of Nb group flexible metal alloy layer, above one layer of Nb group metal compound, and above one layer of Nb group flexible metal alloy. The invention is made from laser deposition method, while the metal compound layer is directly composed on the flexible metal alloy layer via said method; the flexible metal layer and metal compound layer are smelt, while their thickness and ratio can be controlled. The invention has high flexibility in room temperature and high temperature.

Description

technical field [0001] The invention relates to a high-temperature NbTiAl-based intermetallic compound composite material with a laminated structure, belonging to the field of intermetallic compound-based composite materials. Background of the invention [0002] Intermetallic compounds have long-range ordered structural properties, good high-temperature strength and oxidation resistance, high specific strength, high melting point, high thermal conductivity, and low thermal expansion coefficient. They are ideal high-temperature structural materials with good potential application value . However, the structural characteristics of intermetallic compounds such as insufficient slip systems, large slip vectors, limited cross-slip, difficulty in grain boundary slip, and hydrogen embrittlement at grain boundaries lead to their large room temperature brittleness, high brittle-ductile transition temperature and very low Poor processing and forming characteristics make it difficult t...

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Application Information

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IPC IPC(8): B32B15/01B32B33/00C23C24/10B23K26/34B23K26/342
Inventor 钟敏霖何金江刘文今
Owner TSINGHUA UNIV
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