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AuGe eutectic alloy solidification structure regulation and control method and AuGe eutectic alloy material prepared through method

A technology of solidification structure and eutectic alloy, applied in the field of AuGe eutectic alloy solidification structure control, alloy material, alloy solidification structure control, can solve the problems of poor processing performance, alloy brittleness, poor processing formability and wide application of eutectic solder, etc. Achieve the effect of improving the forming performance, solving the coarse structure, and improving the processing and forming performance of the AuGe eutectic alloy

Inactive Publication Date: 2019-01-15
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the AuGe eutectic alloy has many uses, because the structure of the AuGe eutectic alloy at room temperature is a eutectic composed of Au-rich α solid solution and pure Ge, and the crystal lattice of Ge is diamond-type, so the alloy Very brittle, poor processing performance, difficult to process into materials
The poor formability of AuGe eutectic alloy has become a key problem restricting the wide application of this eutectic solder

Method used

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  • AuGe eutectic alloy solidification structure regulation and control method and AuGe eutectic alloy material prepared through method
  • AuGe eutectic alloy solidification structure regulation and control method and AuGe eutectic alloy material prepared through method
  • AuGe eutectic alloy solidification structure regulation and control method and AuGe eutectic alloy material prepared through method

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Embodiment 1

[0027] Laboratory equipment:

[0028] High frequency induction melting furnace;

[0029] Infrared thermometer (model Impack IGA320 / 23).

[0030] The method for controlling the solidification structure of the AuGe eutectic alloy in this embodiment includes the following steps:

[0031] Step (1), AuGe alloy preparation

[0032] Gold flakes (Au) with a purity of 99.99% and germanium blocks (Ge) with a purity of 99.99% were weighed at a ratio of 88:12 by mass, and about 2 g of a mixture was prepared.

[0033] Put the prepared mixture into the graphite crucible, then place it in the middle of the vacuum induction coil, and evacuate to 3.6×10 -4 Pa, turn on the power to start melting the alloy, the heating rate is 3 K / s, the alloy is melted, and the alloy is remelted three times to obtain a master alloy with uniform composition.

[0034] Step (2), control the solidification structure to obtain a regular grid-like eutectic structure.

[0035] After cleaning the quartz tube with...

Embodiment 2

[0039] The method for controlling the solidification structure of the AuGe eutectic alloy in this embodiment includes the following steps:

[0040] Step (1), AuGe alloy preparation

[0041] Gold flakes (Au) with a purity of 99.99% and germanium blocks (Ge) with a purity of 99.99% were weighed at a ratio of 88:12 by mass, and about 2 g of a mixture was prepared.

[0042] Put the prepared mixture into the graphite crucible, then place it in the middle of the vacuum induction coil, and evacuate to 3.6×10 -4 Pa, turn on the power to start melting the alloy, the heating rate is 3-5 K / s, the alloy is melted, and the alloy is remelted 3 times to obtain a master alloy with uniform composition.

[0043] Step (2), control the solidification structure to obtain a regular grid-like eutectic structure.

[0044] The quartz tube was cleaned with alcohol, injected with acetone, cleaned in an ultrasonic oscillator for 5 min, and dried for use. Then the smelted master alloy was cleaned in a...

Embodiment 3

[0048] The method for controlling the solidification structure of the AuGe eutectic alloy in this embodiment includes the following steps:

[0049] Step (1), AuGe alloy preparation

[0050] Gold flakes (Au) with a purity of 99.99% and germanium blocks (Ge) with a purity of 99.99% were weighed according to a mass percentage of 88:12, and about 2 g of a mixture was prepared.

[0051] Put the prepared mixture into the graphite crucible, then place it in the middle of the vacuum induction coil, and evacuate to 3.6×10 -4 Pa, turn on the power to start melting the alloy, the heating rate is 4K / s, the alloy is melted, and the alloy is remelted 3 times to obtain a master alloy with uniform composition.

[0052] Step (2), control the solidification structure to obtain a regular grid-like eutectic structure.

[0053] The quartz tube was cleaned with alcohol, injected with acetone, cleaned in an ultrasonic oscillator for 5 min, and dried for use. Then the smelted master alloy was cle...

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Abstract

The invention discloses an AuGe eutectic alloy solidification structure regulation and control method and an AuGe eutectic alloy material prepared through the method. The method comprises the following steps of (1) preparing an AuGe alloy; and (2) regulation and control of a solidification structure. Through the cladding melting purification and cyclical superheating technology by regulating and controlling parameters such as the type and viscosity of a cladding agent, the superheating degree of an alloy melt and the superheating cycle index, the solidification rate and the supercooling degreeof the AuGe eutectic alloy can be changed, and the AuGe eutectic alloy solidification structure can be regulated and controlled. The method is simple and easy to implement and provides a new path forimproving the processing formability of the AuGe eutectic alloy.

Description

technical field [0001] The invention relates to a method for regulating the solidification structure of an alloy, in particular to a method for regulating the solidification structure of an AuGe eutectic alloy, and also relates to an alloy material obtained by the method, which belongs to the field of new materials. Background technique [0002] AuGe eutectic alloy (mass ratio Au 88wt.%, Ge 12wt.%) is a low melting point eutectic material with a density of 17.5g / cm 3 , and the eutectic temperature is 356 °C. It can be used as ohmic contact material in semiconductor and microwave devices. It can form a good ohmic contact with N-type GaAs, so it is considered to be an ideal sputtering and evaporation source. At the same time, AuGe eutectic alloy is also widely used as low melting point eutectic solder for components such as transistors and integrated circuits, and has important applications in the fields of chip packaging and welding. Although the AuGe eutectic alloy has ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C5/02C22C1/06B22D27/20
CPCB22D27/20C22C1/02C22C1/06C22C5/02
Inventor 熊凯毛勇郭磊张顺猛许思勇朱振永
Owner YUNNAN UNIV
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