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Method of preparing nickel-aluminum base alloy porous material

A porous material, nickel-aluminum-based technology, which is applied in the field of preparation of nickel-aluminum-based alloy porous materials, can solve the problems of uncontrollable pore size, uncontrolled porosity, uneven pore distribution, etc., so as to reduce the preparation cost and the degree of pollution. Small, easy-to-remove effect

Active Publication Date: 2009-11-04
江西咏泰粉末冶金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The porous nickel-aluminum-based alloys produced in the above studies all have the following problems: 1. The pore size is uncontrollable; 2. The pore distribution is uneven; 3. The porosity cannot be adjusted freely.

Method used

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  • Method of preparing nickel-aluminum base alloy porous material
  • Method of preparing nickel-aluminum base alloy porous material
  • Method of preparing nickel-aluminum base alloy porous material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: Ni powder with a particle size of 1-10 μm, Al powder with a particle size of 10-100 μm and NaCl powder with a particle size of 100-200 μm are used, and Ni:Al:NaCl is proportioned according to the mass ratio of 6.5:1:3. Molding or cold isostatic pressing under a pressure of 500Mpa to make a cold compact with a diameter of d50mm×5mm, then place it in a vacuum sintering furnace, control the vacuum degree to 0.1~10Pa, and raise the temperature at a rate of 5~20°C to Sintering at 500~650°C, holding time: 1~4h, then continue to heat up to 800~950°C at a rate of 5~20°C, hold for 1~4h, and finally, still heat up to 1000°C at a rate of 5~20°C , heat preservation for 1~4h, and then cooled with the furnace to prepare a porous nickel-aluminum-based alloy material with a size of d50mm×5mm and a porosity of 60.5%.

Embodiment 2

[0034] Embodiment 2: Ni powder with a particle size of 1-10 μm, Al powder with a particle size of 10-100 μm and NaCl powder with a particle size of 100-200 μm are used, and Ni:Al:NaCl is proportioned according to the mass ratio of 6.5:1:7.5, Molding or cold isostatic pressing under a pressure of 500Mpa to make a cold compact with a diameter of d50mm×5mm, then place it in a vacuum sintering furnace, control the vacuum degree to 0.1~10Pa, and raise the temperature at a rate of 5~20°C to Sintering at 500~650°C, holding time: 1~4h, then continue to heat up to 800~950°C at a rate of 5~20°C, hold for 1~4h, and finally, still heat up at a rate of 5~20°C to change to 1000°C, heat preservation for 1~4h, and then cool in the furnace to produce a porous nickel-aluminum-based alloy material with a size of d50mm×5mm, and its porosity is 71%.

Embodiment 3

[0035] Embodiment 3: Ni powder with a particle size of 1-10 μm, Al powder with a particle size of 10-100 μm and NaCl powder with a particle size of 100-200 μm are used, and the ratio of Ni:Al:NaCl is 6.5:1:23 by mass, Molding or cold isostatic pressing under a pressure of 500Mpa to make a cold compact with a diameter of d50mm×5mm, then place it in a vacuum sintering furnace, control the vacuum degree to 0.1~10Pa, and raise the temperature at a rate of 5~20°C to Sintering at 500~650°C, holding time: 1~4h, then continue to heat up to 800~950°C at a rate of 5~20°C, hold for 1~4h, and finally, still heat up to 1000°C at a rate of 5~20°C , heat preservation for 1~4h, and then cooled with the furnace to prepare a porous nickel-aluminum-based alloy material with a size of d50mm×5mm and a porosity of 90%.

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Abstract

A preparation method of a nickel-aluminum-based alloy porous material is to mix Ni powder with a particle size of 1-10 μm, Al powder with a particle size of 10-100 μm, and NaCl with a particle size of 0.01-1 mm by weight percentage, and mix them at 500-100 μm Cold pressing under 600MPa pressure, then sintering at 500-650°C at low temperature, then removing the pore-forming agent at 800-950°C at medium temperature, and finally, sintering at 1000°C at high temperature to make the intermetallic compound completely form Ni3Al phase. The invention has the advantages of simple process, convenient operation, low production cost, controllable pore size, uniform pore distribution and freely adjustable porosity, is suitable for industrial production, is environmentally friendly, and can replace the existing porous reactor material production process.

Description

technical field [0001] The invention relates to a preparation method of a nickel-aluminum base alloy porous material. Background technique [0002] A porous reactor is a carrier with a porous structure that can be used for various chemical reactions. Compared with traditional reactors, this reactor has many advantages such as high specific surface area, high thermal conductivity and high mass mobility. In recent years, porous reactors have attracted great attention of researchers as a compact and efficient hydrogen production system. [0003] Under normal circumstances, the porous reactor uses stainless steel and silicon-based materials as structural plates, and at the same time, porous support materials and activated catalysts are plated on the structural plates by complex chemical sputtering methods. However, due to the poor heat insulation performance of stainless steel and the low formability and mechanical strength of silicon-based materials, the performance of the po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08
Inventor 刘咏何晓宇刘彬李为张伟
Owner 江西咏泰粉末冶金有限公司
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