Yttrium oxide-tungsten continuous gradient material and preparation method thereof and application to high-temperature alloy smelting crucible manufacturing

A gradient material, yttrium oxide technology, applied in the field of materials, can solve the problems of reducing the thermal shock resistance of components, thermal stress mismatch, reducing the thermal mechanical properties of material components, etc., so as to improve the thermal shock resistance and high temperature mechanical properties. The effect of strong erosion ability, excellent mechanical properties and erosion resistance

A gradient material, yttrium oxide technology, applied in the field of materials, can solve the problems of reducing the thermal shock resistance of components, thermal stress mismatch, reducing the thermal mechanical properties of material components, etc., so as to improve the thermal shock resistance and high temperature mechanical properties. The effect of strong erosion ability, excellent mechanical properties and erosion resistance

CN106623943AInactive Publication Date: 2017-05-10HARBIN INST OF TECH
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  • Yttrium oxide-tungsten continuous gradient material and preparation method thereof and application to high-temperature alloy smelting crucible manufacturing
  • Yttrium oxide-tungsten continuous gradient material and preparation method thereof and application to high-temperature alloy smelting crucible manufacturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] According to the preset l=1.0cm of the continuous gradient material, according to the formula and (wherein p=0.1), respectively weighed 1 part (parts by weight, the same below) of yttrium oxide powder with an average particle diameter of 1 μm and a purity of 98%, and 3.86 parts of tungsten powder with an average particle diameter of 2 μm and a purity of 98%. Water is selected as a solvent, polyethylene is used as a dispersant, water is used to prepare tungsten powder and yttrium oxide powder into a suspension, and the dispersant polyethylene is added so that its molar concentration in the dispersion is 0.5 mol%. The two dispersion liquids were respectively ultrasonically dispersed and stirred for 20 minutes to prepare dispersion liquids. use figure 1 The settling device is used for settling. During operation, the settling pipe 2 is filled with dispersion medium, the valve is closed, and the mold inserting section is put into the mold. Add the dispersion to be settl...

Embodiment 2

[0057] According to the preset l=2.0cm of the continuous gradient material, as in Example 1, according to the set formula, weigh 1 part of yttrium oxide powder with an average particle diameter of 1.5 μm and a purity of 98.5%, and the average particle diameter is 2 μm , 3.86 parts of tungsten powder with a purity of 98%, select ethanol as the solvent, polyacrylic acid as the dispersant, use water to prepare the tungsten powder and the yttrium oxide powder into a suspension, and add the dispersant polyacrylic acid to make it in the dispersion The molar concentration is 1mol%. The two dispersion liquids were respectively ultrasonically dispersed and stirred for 25 minutes to prepare dispersion liquids. use figure 1 The settling device is used for settling. During operation, the settling pipe 2 is filled with dispersion medium, the valve is closed, and the mold inserting section is put into the mold. Add the dispersion to be settled into the settling tube 1. After the dispersio...

Embodiment 3

[0060] As in Example 1, according to the set formula, l=1.0cm, weigh 1 part of yttrium oxide powder with an average particle diameter of 1.5 μm and a purity of 98.0%, and 3.86 tungsten powders with an average particle diameter of 2 μm and a purity of 98.5%. Parts, choose ethanol as solvent, PE as dispersant, as dispersant, use ethanol to prepare tungsten powder and yttrium oxide powder into suspension, and add dispersant PE so that its molar concentration in the dispersion is 1.5mol %. The two dispersion liquids were respectively ultrasonically dispersed and stirred for 20 minutes to prepare dispersion liquids. use figure 1 The settling device is used for settling. During operation, the settling pipe 2 is filled with dispersion medium, the valve is closed, and the mold inserting section is put into the mold. Add the dispersion to be settled into the settling tube 1. After the dispersion is stable, open the valve, and the particles will freely settle into the mold under the a...

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Abstract

The invention relates to a yttrium oxide-tungsten continuous gradient material and a preparation method thereof and application to high-temperature alloy smelting crucible manufacturing. The gradient material comprises a tungsten layer with a thickness of 10, a yttrium oxide layer with a thickness of 11, and a transition layer with a thickness of 12 and with a tungsten-enriched surface and a yttrium oxide-enriched surface; 10 and 11 are independently not lower than 0; 12 is higher than 0; and the volume fraction of yttrium oxide in the transition layer from a position z of the tungsten-enriched surface is CY2O3=(z-10 / 1)p, and the volume fraction of tungsten is CW=1-CY2O3, wherein 1=10+12, p=0.1, z is not higher than 1 and not lower than 10. The method preferentially adopts a free precipitation mode to combine with a cold press molding and sintering process to form the transition layer. The invention further provides the application of the gradient material to manufacturing of high-temperature alloy smelting crucibles. The gradient material is excellent in thermal shock resistance and erosion resistance, and can be widely applied to the field of high-temperature alloy smelting. The method is simple in process, lower in energy consumption, environment-friendly and broad in industrial application prospect.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a yttrium oxide-tungsten continuous gradient material, a preparation method thereof, and an application in the manufacture of a high-temperature alloy melting crucible. [0002] technical background [0003] With the development of science, some metals and alloy materials with special properties are widely used in the automobile industry, aerospace, electrical and electronics, chemical industry, petroleum, national defense and military industry, etc. Including magnesium alloy, aluminum alloy, nickel alloy, copper alloy, uranium alloy, etc. For these alloy materials, high purity is required during use to ensure performance. Therefore, the smelting of alloys has important national value. Due to the advantages of high temperature resistance, good thermal shock resistance, easy processing and low price, graphite materials are widely used as crucible materials for melting superal...

Claims

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Application Information

Patent Timeline
10 May 2017
Publication
CN106623943A
IPC
B22F7/02; B22F1/00; F27B14/10; B22F3/02; B22F3/04; B22F3/10; B22F3/14; B22F3/15
CPC
F27B14/10; B22F3/02; B22F3/04; B22F3/10; B22F3/14; B22F3/15; B22F7/02; B22F2998/10
Inventors
陈磊; 王诗阳