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Brazing filler metal for brazing ZrB2-SiC ultrahigh-temperature ceramic and process for brazing by using brazing filler metal

A technology of ultra-high temperature ceramics and zrb2-sic, which is applied in welding/cutting media/materials, welding media, manufacturing tools, etc., can solve problems such as poor wettability, poor mechanical properties, and non-dense interface bonding, and achieve Improve the mechanical properties, improve the wetting and spreading ability, and the effect of surface wetting and spreading

Active Publication Date: 2016-11-16
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned solders often have problems such as poor wettability, non-dense interfacial bonding, and poor mechanical properties during use.

Method used

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  • Brazing filler metal for brazing ZrB2-SiC ultrahigh-temperature ceramic and process for brazing by using brazing filler metal
  • Brazing filler metal for brazing ZrB2-SiC ultrahigh-temperature ceramic and process for brazing by using brazing filler metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] ZrB of the present invention 2 -SiC ultra-high temperature ceramic samples are all 3mm×3mm×17mm in size, and the surface to be brazed is 3mm×17mm in section.

[0015] The composition and content of the solder: Cu 39.4%, Ti 24.3%, Zr 27.8%, Ni 6.0% and Co 2.5%, and the thickness of the solder is 80 μm.

[0016] The preparation method of this solder comprises the steps:

[0017] 1) Take and mix five kinds of raw materials, 39.4g of Cu particles, 24.3g of Ti particles, 27.8g of Zr particles, 6.0g of Ni particles, and 2.5g of Co particles with a purity higher than 99.99% by weight percentage, wherein Cu particles, Ti particles , Zr particles, Ni particles, and Co particles have a particle size of 2-5 mm, mix them and pour them into a container filled with acetone, and put the container in an ultrasonic cleaner at room temperature for 12 minutes;

[0018] 2) Pour out the acetone waste liquid after cleaning, then put the mixture into an oven at 40°C for drying to obtain a d...

Embodiment 2

[0031] ZrB used in the present invention 2 -SiC ultra-high temperature ceramic samples are all 3mm×3mm×17mm in size, and the surface to be brazed is 3mm×17mm in section.

[0032] The composition and content of solder: Cu 38.8%, Ti 24.6%, Zr 27.8%, Ni 6.2%, Co 2.6%.

[0033] The preparation method of the solder is the same as that in Example 1, and the thickness of the prepared solder foil strip is 80 μm.

[0034] The technique of brazing by brazing filler metal of the present invention may further comprise the steps:

[0035] (1) Preparation stage: ZrB to be brazed 2 -Clean the surface of SiC ultra-high temperature ceramic samples to remove impurities, oil stains and oxide films on the surface, use W28~W7 metallographic sandpaper to grind and smooth, and use a polishing cloth to polish, and then ZrB 2 - SiC ultra-high temperature ceramics and brazing foil are placed in acetone, ultrasonically cleaned for 15 minutes, and dried;

[0036] (2) Assembly stage: use 502 instant a...

Embodiment 3

[0040] ZrB used in the present invention 2 -SiC ultra-high temperature ceramic samples are all 3mm×3mm×17mm in size, and the surface to be brazed is 3mm×17mm in section.

[0041] The composition and content of solder: Cu 38.9%, Ti 24.3%, Zr 28.1%, Ni 6.2%, Co 2.5%. The preparation method of the solder is the same as that in Example 1, and the thickness of the prepared solder foil strip is 80 μm.

[0042] The technique of brazing by brazing filler metal of the present invention may further comprise the steps:

[0043] (1) Preparation stage: ZrB to be brazed 2 -Clean the surface of SiC ultra-high temperature ceramic samples to remove impurities, oil stains and oxide films on the surface, use W28~W7 metallographic sandpaper to grind and smooth, and use a polishing cloth to polish, and then ZrB 2 - SiC ultra-high temperature ceramics and brazing foil are placed in acetone, ultrasonically cleaned for 15 minutes, and dried;

[0044] (2) Assembly stage: use 502 instant adhesive t...

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Abstract

The invention discloses brazing filler metal for brazing ZrB2-SiC ultrahigh-temperature ceramic and a process for brazing by using the brazing filler metal. The brazing filler metal comprises Cu, Ti, Zr, Ni and Co. The brazing process comprises the following steps: various raw materials are mixed to manufacture a brazing material to assemble on the ZrB2-SiC ultrahigh-temperature ceramic to form a welding sample; and the welding sample is positioned in vacuum brazing equipment, is heated to reach 910-1000 DEG C by a heating-insulation-heating-insulation mode, and is cooled to reach the room temperature. The brazing filler metal is proper in melting temperature and uniform in melting; and meanwhile, the vacuum brazing process is adopted, so that parent metal is located in a vacuum state in the heating process without the deformation and grain thickening phenomenon and without generating such problems as oxidation and pollution, the operation is stable and reliable, the surface wetting spreadability is better, the brazing gap filling is facilitated, the joint comprehensive performance is improved, and a brazing joint with excellent performance can be obtained.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a method for ZrB 2 -SiC ultra-high temperature ceramic brazing filler metal and brazing process using the brazing filler metal. Background technique [0002] In ultra-high temperature ceramics, ZrB 2 The representative ultra-high temperature ceramic material has high thermal conductivity, moderate thermal expansion coefficient and good anti-oxidation and ablation performance. Key parts such as nose cone and leading edge of high-speed aircraft. Therefore, it has received extensive attention at home and abroad in recent years. [0003] Ultra-high temperature ceramic materials are generally prepared by traditional methods such as hot pressing sintering and spark plasma sintering. Usually, only ultra-high temperature ceramic materials with small size and simple shape can be prepared. However, in practical applications, ultra-high-temperature ceramic structures with complex struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K1/008B23K1/19B23K1/20
CPCB23K1/008B23K1/19B23K1/206B23K35/302
Inventor 许祥平刘启明夏春智汪鸿邹家生
Owner JIANGSU UNIV OF SCI & TECH
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