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Nb/Re composite multilayer material and preparation thereof

A technology of layered composite materials and raw materials, which is applied in metal layered products, chemical instruments and methods, metal material coating processes, etc., can solve the problem of loss of strengthening effect of alloy wires, and achieve the effect of weight reduction and strength improvement.

Inactive Publication Date: 2013-04-24
SINO PLATINUM METALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the temperature exceeds 1300 °C, the matrix and the alloy wire will diffuse, and the W-26Re alloy wire will gradually lose its strengthening effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The preparation of the two-layer Nb / Re layered composite material of the present invention, the volume fraction of Re is 20%, and the total thickness of the composite material is 1mm: take molybdenum as the deposition matrix, process the molybdenum into a cuboid, and place the molybdenum core in the deposition chamber for rotation On the platform, the position of the molybdenum core is fixed in the middle of the induction coil. When depositing niobium, a certain amount of raw material niobium flakes are installed in the chlorination chamber, and hydrogen gas is used as a reducing reaction gas; when rhenium is deposited, a certain amount of raw material rhenium flakes are installed in the chlorination chamber. The system is evacuated, and the vacuum degree is 10 -2 Torr. Deposit the rhenium layer first: heat the molybdenum core substrate and the rhenium raw material in the chlorination chamber to the deposition temperature and the chlorination temperature respectively, ...

Embodiment 2

[0018] The volume fraction of Re in the two-layer Nb / Re layered composite material in Example 1 of the present invention is determined to be 30%, and the total thickness of the composite material is still 1 mm. The two-layer Nb / Re layered composite material was prepared using the same technical method and conditions: the thickness of the rhenium layer was 0.3mm, and the thickness of the niobium layer was 0.7mm. Heat treatment conditions: 1600℃×4h. Mechanical properties of the material: the tensile strength at room temperature is 611MPa, the elongation is 16.4%; the density of the composite material is 12.23g / cm 3 .

Embodiment 3

[0020]The volume fraction of Re in the two-layer Nb / Re layered composite material in Example 1 of the present invention is determined to be 40%, and the total thickness of the composite material is still 1mm. The two-layer Nb / Re layered composite material was prepared using the same technical method and conditions: the thickness of the rhenium layer was 0.4mm, and the thickness of the niobium layer was 0.6mm. No heat treatment conditions were performed. Mechanical properties of the material: the tensile strength at room temperature is 426MPa, and the elongation is 12.0%. The density of the composite material is 12.99g / cm 3 .

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PUM

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Abstract

The invention discloses a high-strength, low-density and low-cost Nb / Re laminated composite material and a preparation technique thereof. The laminated composite material uses niobium as a substrate layer material and rhenium as a reinforcing layer material. Rhenium accounts for 20, 30 and 40 percent of the volume of the composite material respectively. The composite material has 2 layers to the minimum and 10 layers to the maximum. The high-strength, low-density and low-cost Nb / Re laminated composite material is prepared by a chemical Vapor deposition (CVD) near net-shape forming technology through optimization of various technological parameters and a heat treatment process during the preparation. Maximum tensile strength of the composite material at room temperature is 675MPa, the maximum percentage of elongtation of the composite material is 16.4 percent, and the density of the composite material is more than 99.5 percent of a theoretical density. Compared with pure rhenium, the Nb / Re laminated composite material is 38.2 to 46.5 percent lighter.

Description

technical field [0001] The invention relates to a high-performance, low-cost, low-density refractory metal layered composite material and its preparation method, especially the Nb / Re layered composite material and its CVD preparation technology. Background technique [0002] With the development of aerospace technology, the performance requirements of space vehicle engines such as satellites are getting higher and higher, and the working temperature needs to reach above 1600 °C. The operating temperature of the engine mainly depends on the temperature resistance of the thrust chamber nozzle material and coating. At present, the substrate material of aerospace engine nozzle is generally NbHf alloy (C103) as substrate material, silicide as coating, and its working temperature cannot exceed 1300°C. The temperature resistance of the satellite engine nozzle is getting higher and higher, and the range of material selection can only be refractory metals or high-temperature ceramic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/01C23C30/00C23C16/08C23C16/56C23C16/44
Inventor 胡昌义陈力魏燕蔡宏中王云毛传军王健
Owner SINO PLATINUM METALS CO LTD