硼硅酸盐玻璃钎料连接RB–SiC陶瓷的接头强化机理
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摘要
使用硼硅酸盐玻璃钎料(BS),在650～850℃温度范围内实现了反应烧结碳化硅(RB–SiC)材料的连接,通过控制连接接头中RB–SiC/BS界面的玻璃分相(富碱硼相)和玻璃焊缝中玻璃析晶相(钛酸盐晶体KNa TiO_3)的数量和尺寸,有效缓释了接头中的残余应力,提高了连接强度,在T=750℃条件下获得钎焊接头抗剪强度的最高值为13.9 MPa。
A reliable bonding of silicon carbide(RB–SiC) ceramic was obtained via sintering at 650–850 ℃with borosilicate glass braze(BS). The residual stress of joint is released due to the thermal mismatch when the size and number of the phase-separation(rich alkali boron phase) at the RB–SiC/BS interface and the crystallization(titanate crystal KNaTiO_3) in the glass seam are controlled, thus improving the joint shear strength. A maximal shear strength(i.e., 13.9 MPa) of brazed joints is obtained at 750 ℃.
A reliable bonding of silicon carbide(RB–SiC) ceramic was obtained via sintering at 650–850 ℃with borosilicate glass braze(BS). The residual stress of joint is released due to the thermal mismatch when the size and number of the phase-separation(rich alkali boron phase) at the RB–SiC/BS interface and the crystallization(titanate crystal KNaTiO_3) in the glass seam are controlled, thus improving the joint shear strength. A maximal shear strength(i.e., 13.9 MPa) of brazed joints is obtained at 750 ℃.
引文
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[3]张玉娣,张长瑞,周新贵,等.SiC基陶瓷卫星反射镜研究进展[J].材料导报,2002,16(9):37-39.ZHANG Yudi,ZHANG Changrui,ZHOU Xingui,et al.Mater Rev(in Chinese),2002,16(9):37-39.
[4]高明星.空间大口径光学主镜展开机构设计[D].哈尔滨:哈尔滨工业大学,2016.GAO Mingxing.The design of deplioyable mechanisms of space large aperture optical primary mirror(in Chinese,dissertation).Harbin:Harbin Institute of technology,2016.
[5]包奇红,沙巍,陈长征,等.空间SiC反射镜背部中心支撑特性[J].光子学报,2017,46(2):22-31.BAO Qihong,SHA Wei,CHEN Changzheng,et al.Acta Phot Sin(in Chinese),2017,46(2):22-31.
[6]XU H,GUAN Y J.Structural design of 1 m diameter space mirror component of space camera[J].Opt Precis Eng,2013,21(6):1488-1495.
[7]LIU Y,QI Q,ZHUY,et al.Microstructure and joining strength evaluation of SiC/SiC joints brazed with SiCp/Ag-Cu-Ti hybrid tapes[J].J Adhes Sci Technol,2015,29(15):1563-1571.
[8]PIPIT F,ARIFIN S,JEONG D H,et al.Joining of SiC monoliths using a thin MAX phase tape and the elimination of joining layer by solid-state diffusion[J].J Eur Ceram Soc,2018,38:3433-3440.
[9]YANG H,ZHOU X,SHI W,et al.Thickness-dependent phase evolution and bonding strength of SiC ceramics joints with active Ti interlayer[J].J Eur Ceram Soc,2017,37:1233-1241.
[10]CASALEGNO V,KONDO S,HINOKI T,et al.Ca O-Al2O3glass-ceramic as a joining material for SiC based components:Amicrostructural study of the effect of Si-ion irradiation[J].J Nucl Mater,2018,501:172-180.
[11]FAN S,LIU J,MA X,et al.Microstructure and properties of SiCf/SiCjoint brazed by Y-Al-Si-O glass[J].Ceram Int,2018,44:8656-8663.
[12]AHMAD S,HERRMANN M,MAHMOUD M M,et al.Application of Nd2O3-Al2O3-SiO2 glass solder for joining of silicon carbide components[J].J Eur Ceram Soc,2016,36:1559-1569.
[13]FERRARIS M,CASALEGNO V,RIZZO S.et al.Effects of neutron irradiation on glass ceramics as pressure-less joining materials for SiC based components for nuclear applications[J].JNucl Mater,2012,429:166-172.
[14]LUO Z,JIANG D,ZHANG J,et al.Joining of sintered silicon carbide ceramics using sodium borosilicate glass as the solder[J].Int J Appl Ceram Technol,2012,9(4):742-750.
[15]徐建梅,谭劲.Na2O-B2O3-SiO2玻璃分相结构与工艺的关系[J].非金属矿,2001(b11):41-42.XU Jianmei,TAN Jin.Non-Metalli Mines(in Chinese),2001(b11):41-42.
[16]LIN P P,LIN T S,HE P,et al.Wetting behavior and bonding characteristics of bismuth-based glass brazes used to join Li-Ti ferrite systems[J].Ceram Int,2017,43:13530-13540.