Thermal cycling behavior of alumina-graphite brazed joints in electron tube applications

被引：11

作者：

Dandapat, Nandadulal ^{[1
,2
]}

Ghosh, Sumana ^{[1
]}

Pal, Kalyan Sundar ^{[3
]}

Datta, Someswar ^{[1
]}

Guha, Bichitra Kumar ^{[2
]}

机构：

[1] CSIR, Cent Glass & Ceram Res Inst, Kolkata 700032, India

[2] Bengal Engn & Sci Univ, Dept Phys, Howrah 711103, India

[3] Inst Plasma Res, Gandhinagar 302428, India

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2014年 / 24卷 / 06期

关键词：

brazed joints; thermal cycling; brazing strength; hermeticity; FILLER METAL; CU; ALLOYS; CARBON; TI;

D O I：

10.1016/S1003-6326(14)63239-8

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Alumina was joined with graphite by active metal brazing technique at 895, 900, 905, and 910 degrees C for 10 min in vacuum of 0.67 mPa using Ti-Cu-Ag (68.8Ag-26.7Cu-4.5Ti; mass fraction, %) as filler material. The brazed samples were thermal cycled between 30 and 600 degrees C and characterized. X-ray diffraction results show strong reaction between titanium and carbon as well as titanium and alumina. Scanning electron microscopy and helium leak tests show that the initial and thermal cycled brazed samples are devoid of cracks or any other defects and hermeticity in nature. Brazing strength of the joints is found to be satisfactory.

引用

页码：1666 / 1673

页数：8

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