Crystallization kinetic of Li2O-MgO-Al2O3-SiO2 glass-ceramic and its application for joining of porous Si3N4 ceramic
Crystallization kinetic of Li2O-MgO-Al2O3-SiO2 glass-ceramic and its application for joining of porous Si3N4 ceramic
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Li2O-MgO-Al2O3-SiO2微晶玻璃的结晶动力学及其在多孔Si3N4陶瓷连接中的应用
DOI：
10.1016/j.matchar.2021.110889
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发表时间：
2021-02
影响因子：
4.7
通讯作者：
Zhang Jie
中科院分区：
文献类型：
--
作者：
Sun Liangbo;Fang Jian;Liu Chunfeng;Guo Songsong;Zhang Jie
首次开发了一种新型的li2o - mgo - al2o3 - sio2玻璃陶瓷，用于连接多孔si3n4陶瓷。研究了微晶玻璃的结晶动力学和微观结构演变。结晶活化能和Avrami指数表明该玻璃陶瓷具有较高的结晶度和表面结晶性能。β-和γ- lialsi2o6相在玻璃陶瓷中共存，同时还析出mg2sio4和mgal2o4两种小相。利用这种玻璃陶瓷成功地将多孔si3n4与自身连接在一起。在接头处形成了网状的LiAlSi2O6/ mgal2o4玻璃陶瓷夹层和玻璃/ si3n4浸润层。剪切试验结果表明，该接头在室温和高温（850℃）下都是可靠的。证明了用玻璃陶瓷夹层连接多孔非氧化物陶瓷的可行性。
A novel glass-ceramic of Li2O-MgO-Al2O3-SiO2was developed to join porous Si3N4ceramic itself for the first time. The crystallization kinetic and the microstructure evolution of the glass-ceramic were investigated. The crystallization activation energyEand Avrami exponentnillustrated that the glass-ceramic showed a high crystallinity and surface crystallization behaviour. The β- and γ- LiAlSi2O6phases coexisted in the glass-ceramic and two minor phases of Mg2SiO4and MgAl2O4also precipitated. The porous Si3N4was joined to itself successfully by using this glass-ceramic. A net-like LiAlSi2O6/MgAl2O4glass-ceramic interlayer and an infiltration layer of glass/Si3N4were formed in the joint. According to shear testing, the joint was reliable at room temperature and high temperature (850 °C). It demonstrates the feasibility of joining porous non-oxide ceramics by using glass-ceramic interlayers.
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