کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5437448 | 1398174 | 2017 | 24 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructure and mechanical properties of porous Si3N4/Invar joints brazed with Ag-Cu-Ti+Mo/Cu/Ag-Cu multi-layered composite filler
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
Ag-Cu-Ti/Cu/Ag-Cu multi-layered filler was successfully designed to braze porous Si3N4 and Invar alloy. To further reduce the CTE mismatch between the porous Si3N4 and brazing filler, Mo particles were introduced into Ag-Cu-Ti. The effects of the Mo addition on the microstructure and mechanical properties of the brazed joints were studied. The results showed that, the addition of Mo particles into Ag-Cu-Ti lowered the CTE mismatch and improved the joint strength to a certain degree. However, an excessive content was harmful. The Mo particles could absorb Ti at high temperature, causing Ti shortage in the reaction with the ceramic. When cooling down, the absorbed Ti was released. The released Ti could react with Cu to generate Cu-Ti phase. So, additional Ti was adopted in the brazing filler as a supplement. When the Ti content was 5Â wt%, the reaction layer on the ceramic interface was too thin to transfer enough load. However, when it reached 15Â wt%, the Cu interlayer dissolved completely and Fe-Ti and Ni-Ti phases appeared. The maximum joint shear strength (83Â MPa) was obtained with 10Â wt% Ti and 5Â vol% Mo, which had exceeded 90% of the porous Si3N4 and was 56% higher than the joint brazed without Mo particles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 15, 15 October 2017, Pages 11668-11675
Journal: Ceramics International - Volume 43, Issue 15, 15 October 2017, Pages 11668-11675
نویسندگان
J.Y. Liu, J. Zhang, C.F. Liu, T.P. Wang,