Method for preparing high-melting-point metal ternary diffusion couple

A high-melting-point metal, diffusion couple technology, applied in testing metals, testing metal structures, solid-state diffusion coatings, etc., can solve the problems of solid diffusion and solid-liquid diffusion, and achieve high success rate, easy control of the preparation process, and good results. excellent effect

Active Publication Date: 2021-07-30
KUNMING INST OF PRECIOUS METALS
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  • Abstract
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  • Application Information

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Problems solved by technology

[0007] In the ternary diffusion couple, if the melting point temperatures of the three high-melting point metals are set to be A, C, and B respectively from high to low, then the aforementioned preparation method Among them, the first one is A-B / C couple, which uses solid-solid diffusion; the second one is A-C / B couple, which has solid-solid diffusion and solid-liquid diffusion, and there is no reference to the preparation of A-B by solid-liquid diffusion. / C couple's report

Method used

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  • Method for preparing high-melting-point metal ternary diffusion couple

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Embodiment 1

[0028] (1) Among the three high-melting-point metals of Pt, Au, and Ni, the Au metal block or sheet with the lowest melting point is laid on top of the Pt metal block with the highest melting point, and put into the corundum boat;

[0029] (2) Put the corundum boat into a high-temperature tube furnace, heat it up to 1100°C under the protection of argon, and keep it warm for 30 minutes, so that the Au is evenly melted and covered the surface of the Pt block, then lower the temperature to 900°C, and keep it warm for 120 hours , and then take it out after cooling to room temperature with the furnace;

[0030] (3) The surface of a Ni metal sheet with a thickness of 0.4 mm was ground and polished, and then bent and coated on the Au-Pt bonding interface, fixed with a clamp, vacuum-packed in a quartz tube, and annealed at 900 ° C;

[0031] (4) After the heat treatment is completed, the quartz tube is taken out and rapidly cooled in cold water, and then the prepared diffusion couple i...

Embodiment 2

[0034] (1) Among the three high-melting point metals Pt, Pd, and Cu, the Cu metal block or sheet with the lowest melting point is laid on top of the Pt metal block with the highest melting point, and put into the corundum boat;

[0035] (2) Put the corundum boat into a high-temperature tube furnace, heat it up to 1120°C under the protection of argon, and keep it warm for 30 minutes to let Cu evenly melt and cover the surface of the Pt block, then lower the temperature to 800°C, and keep it warm for 120 hours , and then take out after cooling with the furnace;

[0036] (3) The surface of the Pd metal sheet with a thickness of 0.5 mm was ground and polished, and then bent and coated on the Pt-Cu bonding interface, fixed with a clamp, vacuum-packed in a quartz tube, and diffusion annealed at 800 ° C;

[0037] (4) After the annealing is completed, the quartz tube is taken out and rapidly cooled in cold water, and then the prepared diffusion couple is taken out from the quartz tube...

Embodiment 3

[0039] (1) Among the three high-melting-point metals Pd, Ag, and Pt, the Ag metal block or sheet with the lowest melting point is laid on top of the Pt metal block with the highest melting point, and put into the corundum boat;

[0040] (2) Put the corundum boat into a high-temperature tube furnace, heat it up to 1000°C under the protection of argon, and keep it warm for 30 minutes to allow the Ag to evenly melt and cover the surface of the Pt block, then cool it down to 750°C and keep it warm for 120 hours , and then take out after cooling with the furnace;

[0041] (3) The surface of the Pd metal sheet with a thickness of 0.5 mm was ground and polished, and then bent and coated on the Ag-Pt bonding interface, fixed with a clamp, vacuum-packed in a quartz tube, and diffusion annealed at 750 ° C;

[0042] (4) After the annealing is completed, the quartz tube is taken out and rapidly cooled in cold water, and then the prepared diffusion couple is taken out from the quartz tube, a...

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Abstract

The invention discloses a method for preparing a high-melting-point metal ternary diffusion couple. The method is mainly used for preparing the diffusion couple composed of three kinds of high-melting-point metal. The method comprises the following steps: paving a B metal block or sheet with the lowest melting point in three kinds of high-melting-point metal above an A metal block, then putting A-B metal into a tubular furnace protected by argon, heating to be above the melting point of the B metal, melting the B metal to form metallurgical bonding with the A, and performing diffusion annealing to form an A-B diffusion couple; and then coating the C metal sheet at the interface of the A-B diffusion couple, fixing the C metal sheet by using a clamp, and performing diffusion annealing to prepare the A-B/C ternary diffusion couple. The method is simple, the amount of needed metal is small, the preparation process is easy to control, diffusion couple combination is flexible and controllable, the effect is excellent, and the success rate is high. The method is suitable for preparation of metal material diffusion couples, especially for preparation of precious metal and high-temperature alloy material diffusion couples, and the prepared diffusion couples can be used for research of phase diagrams, diffusion kinetics and thermodynamics.

Description

technical field [0001] The invention relates to a method for preparing a high-melting-point metal ternary diffusion couple, which belongs to the method for preparing a diffusion couple in the fields of metal materials, phase diagram research, high-temperature alloys, brazing and the like. This method is mainly used in the related fields of preparing high-melting-point metal ternary diffusion couples, mainly including welding, brazing, phase diagram determination, high-temperature alloys, diffusion data measurement and other fields. Background technique [0002] Diffusion couple refers to a sample formed by diffusion welding of two or more materials. Sufficient diffusion occurs in the direction perpendicular to the welding surface, forming a continuous diffusion from one phase diffusion layer to another phase diffusion layer with a certain thickness. The thickness of the diffusion layer should meet the needs of the electronic probe to measure the composition distribution. Al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/2251G01N23/2202G01N33/204C23C10/22C23C10/28
CPCG01N23/2251G01N23/2202G01N33/204C23C10/22C23C10/28G01N2223/102Y02E60/50Y02P70/50
Inventor 胡洁琼谢明陈永泰方继恒刘满门王塞北杨有才陈松李爱坤段云昭赵上强
Owner KUNMING INST OF PRECIOUS METALS
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