A method for strengthening porous ceramic joints

A porous ceramic and joint connection technology, which is applied in the field of porous ceramic joint connection, can solve the problems of low connection strength of porous ceramic joints, achieve the effects of improving connection strength, controllable metal content, and improving wettability

Active Publication Date: 2017-06-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of low connection strength of existing porous ceramic joints, and provide a method for strengthening the connection of porous ceramic joints

Method used

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  • A method for strengthening porous ceramic joints
  • A method for strengthening porous ceramic joints
  • A method for strengthening porous ceramic joints

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specific Embodiment approach

[0025] Specific implementation method: This embodiment is a method for strengthening the connection of porous ceramic joints, which is specifically completed according to the following steps:

[0026] 1. Preparation of silver nitrate aqueous solution: Dissolve silver nitrate in deionized water to obtain silver nitrate aqueous solution with a concentration of 0.1g / mL~2.5g / mL;

[0027] 2. Ultrasonic impregnation: First, ultrasonically clean the porous ceramics, and then immerse the porous ceramics in silver nitrate aqueous solution with a concentration of 0.1g / mL-2.5g / mL for ultrasonic impregnation. The ultrasonic impregnation time is 1min-10min. Finally, put it into an oven, and dry it at an oven temperature of 40-120°C for 1h-24h to obtain impregnated and dried porous ceramics;

[0028] 3. Vacuum sintering: place the impregnated and dried porous ceramics in a vacuum sintering furnace, and evacuate the vacuum sintering furnace to a vacuum degree of 7.0×10 -2 Pa~1.5×10 -2 Pa, ...

specific Embodiment approach 2

[0033]Embodiment 2: The difference between this embodiment and Embodiment 1 is that the porous ceramics described in step 2 are ceramics with a porosity of 5% to 90%. Others are the same as the first embodiment.

specific Embodiment approach 3

[0034] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the porous ceramic described in step two is Si 3 N 4 Ceramics, SiAlON ceramics, Si 2 N 2 O ceramics, AlN ceramics, TiN ceramics, SiC ceramics, SiBCN ceramics, BN ceramics, ZrO 2 Ceramic, Al 2 o 3 Ceramic, TiB 2 Ceramic, B 4 Cceramics, ZrB 2 Ceramic, TaB 2 Ceramics, ZrC Ceramics, MoSi 2 Ceramics, MAX phase ceramics or fused silica ceramics; or porous ceramics are composite ceramics, and the composite ceramics are made of Si 3 N 4 Ceramics, SiAlON ceramics, Si 2 N 2 O ceramics, AlN ceramics, TiN ceramics, SiC ceramics, SiBCN ceramics, BN ceramics, ZrO 2 Ceramic, Al 2 o 3 Ceramic, TiB 2 Ceramic, B 4 Cceramics, ZrB 2 Ceramic, TaB 2 Ceramics, ZrC Ceramics, MoSi 2 Two or more of ceramics, MAX phase ceramics and fused silica ceramics are composited; or porous ceramics are reinforced and toughened composite ceramic materials, and the reinforced and toughe...

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Abstract

A method for connecting reinforced porous ceramic joints. The invention belongs to the field of connection between ceramics and same / dissimilar materials, and in particular relates to a method for connecting porous ceramic joints. The purpose of the invention is to solve the problem of low connection strength of existing porous ceramic joints. Connection method: 1. Preparation of silver nitrate aqueous solution; 2. Ultrasonic impregnation to obtain impregnated and dried porous ceramics; 3. Vacuum sintering to obtain porous ceramic parts after vacuum sintering; 4. Porous ceramic connection to obtain connected A porous ceramic sample, that is, a reinforced porous ceramic joint connection is completed. Advantages: Through metallization, the wettability of the solder to the porous ceramic can be improved, the molten solder can be infiltrated into the porous ceramic during the connection process, the thermal matching of the interface can be improved, the residual stress of the connection interface can be eased, and the connection strength and the strength of the connected components can be improved. reliability. The invention is mainly used for the connection of porous ceramics.

Description

technical field [0001] The invention belongs to the field of connection between ceramics and homogeneous / dissimilar materials, and in particular relates to a method for connecting porous ceramic joints. Background technique [0002] Porous ceramics not only have the excellent properties of dense ceramics such as wear resistance, corrosion resistance, high temperature resistance, high strength, high hardness, and good chemical stability, but also have uniform and controllable pores inside, which endow porous ceramics with light weight, Thermal insulation, sound absorption, noise reduction and other properties that traditional dense ceramics do not have, so porous ceramics have broad application prospects in the fields of national defense, aerospace, energy, electronics, machinery, chemical industry, metallurgy and life sciences. However, in the application process of porous ceramics, it is usually necessary to use connection methods to assemble with metal components, or to pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B37/00C04B41/85
Inventor 林铁松庄艳丽何鹏王胜金贾德昌
Owner HARBIN INST OF TECH
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