کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7887711 | 1509791 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Joining of Si3N4/Si3N4 with in-situ formed Si-Al-Yb oxynitride glasses interlayer
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
Si3N4 ceramic was successfully joined to itself with in-situ formed Yb-Si-Al oxynitride glass interlayer. The joints were composed of three parts: (I) Si3N4 matrix, (II) oxynitride glass interlayer in which hexagonal or fine elongated β-sialon grains and a few ball-like β-Si3N4 grains exist, and (III) diffusion zone in Si3N4 matrix containing a thin dark layer and a ~ 25â¯Âµm thick bright layer. The seam owned similar microstructure to matrix and was inosculated with the matrix as a whole. The strength of the joint tended to increase with the increase of bonding temperature and reached the value of 225â¯MPa, when the joints were prepared at 1600â¯Â°C for 30â¯min under a pressure of 1.5â¯MPa. The high-temperature strength remained 94.7% and 75.2% of R.T. strength when the joints were tested at 1000â¯Â°C and 1200â¯Â°C, respectively. It may be contributed to the high softening temperature of the Yb-Si-Al oxynitride glass phase formed in the seam. Even suffered to the air exposure for 10â¯h at 1200â¯Â°C, the residual strength of the joints was still 143â¯MPa, attributed to the existence of YbAG phase.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 7, May 2018, Pages 7831-7836
Journal: Ceramics International - Volume 44, Issue 7, May 2018, Pages 7831-7836
نویسندگان
Ling Li, Chunfeng Liu, Liangbo Sun, Hongjiang Yu, Xinhua Wang, Xuanzhi Wang, Jie Zhang,