Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for connecting SiC ceramic material by using calcium oxide/aluminum oxide/silicon dioxide/lithium oxide glass solder

A lithium oxide glass and silicon dioxide technology is applied in the field of connecting SiC ceramic materials with calcium oxide/alumina/silicon dioxide/lithium oxide glass solder, which can solve the problems of poor radiation resistance of joints and improve the lubrication performance. Wetness and interfacial bonding reliability, improved reliability, and easy-to-use effects

Active Publication Date: 2021-05-28
HARBIN INST OF TECH
View PDF11 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problems that the connection of SiC ceramics needs high temperature and high pressure conditions under the service conditions of the current nuclear reactor, and the joint performance and radiation resistance are poor, and provides a glass solder using calcium oxide / alumina / silicon dioxide / lithium oxide Method for joining SiC ceramic materials

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for connecting SiC ceramic material by using calcium oxide/aluminum oxide/silicon dioxide/lithium oxide glass solder
  • Method for connecting SiC ceramic material by using calcium oxide/aluminum oxide/silicon dioxide/lithium oxide glass solder
  • Method for connecting SiC ceramic material by using calcium oxide/aluminum oxide/silicon dioxide/lithium oxide glass solder

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0020] Specific implementation mode 1: This implementation mode is a method for connecting SiC ceramic materials using calcium oxide / alumina / silicon dioxide / lithium oxide glass solder, specifically according to the following steps:

[0021] 1. Prepare the base material: use an internal cutting machine to cut and prepare SiC ceramic blocks, and then use 400# and 800# diamond grinding discs on the pre-grinder to grind the surface to be welded, and then use the particle size of 3.5μm, 2.5μm and Grinding with 1 μm diamond abrasive paste, and finally using a diamond polishing agent with a particle size of 0.5 μm to perform mechanical polishing on a polishing machine until there is no scratch on the surface to be welded to obtain a SiC ceramic base material;

[0022] In order to improve the interface bonding between the base material and the solder during the welding process, a pre-oxidation treatment is carried out on the SiC base material. The process of the pre-oxidation treatment...

specific Embodiment approach 2

[0026] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, put the SiC ceramic base material obtained above into a muffle furnace, and raise the temperature from room temperature to 1300 °C at a rate of 10 °C / min. And keep it warm for 3 hours, and then lower the temperature to room temperature at a rate of 10°C / min to obtain a pre-oxidized SiC ceramic base material. Others are the same as the first embodiment.

specific Embodiment approach 3

[0027] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: in step two, at first weigh four kinds of raw material powders according to the following mass fractions: 20% CaO, 22% Al 2 o 3 , 55% SiO 2 and 3% Li 2 O. Others are the same as those in Embodiment 1 or 2.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for connecting SiC ceramic materials by using calcium oxide / aluminum oxide / silicon dioxide / lithium oxide glass solder, and relates to a method for connecting SiC ceramic materials by using glass solder. The invention aims to solve the technical problems that the connection of SiC ceramics needs high-temperature and high-pressure conditions under the current nuclear reactor service condition, and the joint performance and the radiation resistance are poor. According to the method, the mechanical property of the joint can be improved, meanwhile, the reliability of the SiC ceramic welding structural part in the nuclear irradiation service environment can be improved, and the welding structure is expected to be used in the nuclear power field. The glass solder connecting method has the advantages that the glass solder connecting method is easy to use, connection can be achieved under the conditions of no pressure, atmosphere and relatively lower connecting temperature of 1200-1280 DEG C, the solder can form a glass ceramic welding seam with high crystallization rate in situ in the welding heat cycle, and the mechanical property and the radiation resistance of a connector can be remarkably improved.

Description

technical field [0001] The invention relates to a method for connecting SiC ceramic materials using glass solder. Background technique [0002] Nuclear power safety is the first element of nuclear energy development. In order to improve the safety and reliability of nuclear reactors, increase the safety factor of the core, increase the melting point of the core, increase the fuel consumption, reduce the pollutants in the primary circuit, reduce the radiation dose of the core to the staff, extend the The reactor lifetime puts forward a more urgent requirement for the development of cladding materials with accident containment margin. [0003] SiC ceramics and their composites (SiCf / SiC) are known for their high melting point, smaller neutron absorption cross section, low decay heat, high thermal conductivity, high temperature stability, high mechanical strength, excellent radiation dimensional stability and corrosion resistance And other advantages, it has become a promising...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B37/00C03C3/062
CPCC04B37/003C03C3/062
Inventor 张杰方健刘春凤孙良博郭松松单提鹏文粤
Owner HARBIN INST OF TECH