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Method for brazing ZrB2-SiC composite ceramic material by using Pd-Co-Ni brazing filler metals

A pd-co-ni, composite ceramic technology, applied in the direction of welding/cutting media/materials, welding media, welding equipment, etc., can solve the problems of reducing the performance of the base material, to reduce the strength of the base material, effectively connect, weaken reciprocal effect

Inactive Publication Date: 2013-10-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problem that the performance of the base material is reduced due to the interaction between the solder and the base metal reinforcement SiC in the existing Pd-Co solder brazing process, and provides a Pd-Co-Ni solder Brazing ZrB 2 -SiC composite ceramic material method

Method used

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  • Method for brazing ZrB2-SiC composite ceramic material by using Pd-Co-Ni brazing filler metals
  • Method for brazing ZrB2-SiC composite ceramic material by using Pd-Co-Ni brazing filler metals
  • Method for brazing ZrB2-SiC composite ceramic material by using Pd-Co-Ni brazing filler metals

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specific Embodiment approach 1

[0015] Specific embodiment one: In this embodiment, a kind of use Pd-Co-Ni solder brazing ZrB 2 -The method of SiC composite ceramic material is carried out by following steps: one, the preparation of Pd-Co-Ni brazing filler metal: be 1 by mass ratio: (2~3): the ratio of (1~2) takes Pd powder body, Co powder and Ni powder, mixed to obtain mixed solder powder, and then add binder to the mixed solder powder to obtain a mixed paste solder, wherein the binder consists of 1.wt% hydroxyl Ethyl cellulose and 99.wt% distilled water are configured;

[0016] 2. Assembling the sample: Use 280#, 800# and 1000# metallographic sandpaper to separate two pieces of ZrB 2 - The surface to be welded of the SiC ceramic base material is polished step by step, and the polished ZrB 2 -SiC ceramic base material is placed in 99% acetone solution by mass percentage, ultrasonically cleaned for 10min to 20min, then cleaned with absolute ethanol, and then dried, and the paste solder is coated on two cle...

specific Embodiment approach 2

[0019] Embodiment 2: This embodiment differs from Embodiment 1 in that the purity of the Pd powder, Co powder and Ni powder described in step 1 is not less than 99%. Others are the same as the first embodiment.

specific Embodiment approach 3

[0020] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the Pd powder, Co powder and Ni powder are weighed in the ratio of atomic weight 1:2.36:1.18 in Step 1. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for brazing ZrB2-SiC composite ceramic material by using Pd-Co-Ni brazing filler metals, which relates to the method for brazing the ZrB2-SiC composite ceramic material and aims at solving the problem that the performance of a base metal is degraded due to interaction between brazing filler metals and a base metal reinforcement body SiC during a brazing process of the existing Pd-Co brazing filler metals. The method comprises the following steps of 1, preparation of Pd-Co-Ni brazing filler metals; 2, sample assembling; and 3, brazed connection, wherein the brazing technology parameters are set in a way that the vacuum degree of a brazing furnace is less than 6*10<-3>Pa, the connection temperature is 1240-1270 DEG C, the heat preservation time is 0-30 min, and the pressure of a connector is 2*10<3>Pa. According to the method disclosed by the invention, the four-point bending strength of the obtained connector is 120MPa and reaches to 65% of the matrix strength of the base metal. The method disclosed by the invention is applied to the field of brazing.

Description

technical field [0001] The invention relates to a brazing ZrB 2 - Method for SiC composite ceramic materials. Background technique [0002] In aerospace research and other high-end fields such as safety, high temperature resistance, corrosion resistance, and oxidation resistance, materials are required to work stably in extremely harsh environments, and especially the requirements for high temperature resistance are getting higher and higher, so ultra-high temperature materials The research of high-melting-point metals is more important. Pure high-melting-point alloys are difficult to meet actual needs, while oxide carbides or borides of high-melting-point metals, namely high-temperature ceramic materials, can withstand high temperatures as high as 1900°C-2500°C, and high-temperature-resistant ceramics such as Boride ceramics can work stably above 1000°C, and maintain excellent properties such as oxidation resistance, corrosion resistance, and high strength, which are incom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/008B23K1/19B23K1/20B23K35/30B23K103/16
Inventor 刘春凤刘佳音巫向阳张杰王天鹏王国超董芸松刘晓文
Owner HARBIN INST OF TECH
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