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Preparation method for synthesizing nanometer oxide particle dispersed and strengthened platinum-based alloy material in situ

A technology of particle dispersion strengthening and nano-oxide, which is applied in the field of precious metal materials, can solve the problems of low production efficiency, long process flow, and long process, and achieve the effects of improving production efficiency, simplifying process flow, and increasing yield

Active Publication Date: 2020-08-11
CHONGQING POLYCOMP INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the above two processes, the thermomechanical laminated composite method has a long process flow, a long time for oxidation treatment in the sheet, is time-consuming and laborious, and has low production efficiency; moreover, it is easy to cause material pollution, inclusions, and bubbles during the laminated composite process, which will affect the quality of the material. overall performance
The powder metallurgy process is also long, although the internal oxidation treatment time of powder is relatively short compared to thin slices; but the powder making mainly includes spray internal oxidation and spark erosion method, the equipment is expensive, the powder yield is low, and the production efficiency is relatively low
Therefore, above-mentioned existing method also has the deficiencies such as long technical process, low production efficiency, yield rate low etc.

Method used

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preparation example Construction

[0046] The invention provides a preparation method for in-situ synthesis of nano-oxide particle dispersion strengthened platinum-based alloy material, comprising the following steps:

[0047] a) heating and melting the platinum-based material and the active element to obtain an alloy melt;

[0048] b) atomizing the alloy melt to obtain alloy powder;

[0049] c) performing in-situ oxidation sintering on the alloy powder to obtain a sintered body;

[0050] d) Press forming and hot forging the sintered body to obtain a gold ingot.

[0051] In the invention, the platinum-based material and the active element are heated and melted firstly, then atomized and pulverized to obtain the alloy powder, and then in-situ oxidation sintering, compression molding and hot forging are carried out to obtain the gold ingot material. The present invention adopts a certain smelting process (including vacuum degree, smelting time after the addition of active elements, etc.), adopts atomization pul...

Embodiment 1

[0086] Preparation of Nano ZrO 2 Particle dispersion strengthened pure platinum

[0087] S1. Composition design: the matrix material is pure Pt, platinum powder in the shape of sponge; the active element is elemental Zr flakes (purity ≥ 99.5%) produced by iodination method, and the width of Zr flakes is 10mm and the thickness is 1mm.

[0088] S2. Weighing ingredients: Weigh 10 kg of platinum sponge and 40 g of elemental zirconium (that is, the addition of active elements is 0.4%).

[0089] S3. Vacuum induction melting: place platinum sponge and zirconium sheet in the zirconia crucible and the secondary feeding device respectively, start induction heating to melt platinum sponge (temperature is 1800°C), and when the platinum is completely melted, vacuumize the furnace body, After the vacuum reaches 10Pa; open the argon valve and fill the furnace with argon until the pressure in the furnace reaches 6×10 4 Pa, close the argon valve, and evacuate the furnace body again until the...

Embodiment 2

[0100] Preparation of Nano ZrO 2 +Y 2 o 3 Particle dispersion strengthened platinum-rhodium alloy

[0101] S1. Composition design: the matrix material is a platinum-rhodium alloy, wherein the rhodium content accounts for 10wt%; the platinum sponge and rhodium powder are used as raw materials to prepare, and the purity of the platinum sponge and rhodium powder are both ≥99.95%. Elemental zirconium and elemental yttrium are used as active elements, both of which have a purity of ≥99.5%; the total amount of active elements added is 0.3%, of which, the added amount of elemental zirconium is 0.2%, and the amount of elemental yttrium is 0.1%.

[0102] S2. Weighing ingredients: Weigh 9.9 kg of platinum sponge and 0.1 kg of rhodium powder; the total amount of active elements added is 0.3%, of which 20 g of elemental zirconium and 10 g of elemental yttrium.

[0103] S3. Vacuum induction smelting: Place platinum sponge and rhodium powder in a zirconia crucible, place active element c...

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Abstract

The invention provides a preparation method for synthesizing a nanometer oxide particle dispersed and strengthened platinum-based alloy material in situ. According to the preparation method, a platinum-based material and active elements are heated to melt, then atomization pulverizing is carried out, and alloy powder is obtained; and then in-situ oxidizing sintering, press forming and hot forgingare carried out, and a gold ingot material is obtained. According to the preparation method, by means of a certain melting process (including the vacuum degree, the melting time after the active elements are added and the like), an atomization pulverizing means and the subsequent processing process are adopted, the technological process is greatly simplified on the basis of guaranteeing the mechanical property and high-temperature creep resistance of a product, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of precious metal materials, in particular to a preparation method for in-situ synthesis of nano-oxide particle dispersion-strengthened platinum-based alloy materials. Background technique [0002] Platinum and its alloy materials are widely used in glass due to their high melting point, good high temperature oxidation resistance and chemical stability, strong resistance to glass liquid erosion, good ductility and weldability, and thermoelectric properties. and glass fiber industry. However, when platinum or platinum alloy materials are used in molten glass at 1100-1400°C, their high-temperature creep resistance is relatively weak. In order to improve the high-temperature creep resistance of platinum or platinum alloy materials, ZrO is generally used in the industry. 2 , Y 2 o 3 and other oxides to strengthen platinum alloy materials and process them into various finished products for use. [0003] In th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C1/04C22C5/04C22F1/14
CPCC22C1/1078C22C5/04C22F1/14
Inventor 杨宗伦刘伟廷蒋朝军尹伟周冬运
Owner CHONGQING POLYCOMP INT
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