بررسی خواص و رفتار لایه میانی Ag-Cu-Ti-Sn-%5.1Zr در اتصال غیرهمجنس آلومینا به مس

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی مواد، دانشگاه صنعتی اصفهان، اصفهان 84156-83111، ایران

2 مرکز آموزش مهارت‌های فنی و مهندسی، دانشگاه صنعتی اصفهان، اصفهان 84156-83111، ایران

چکیده

این مطالعه به‌منظور بررسی اثر هم‌افزایی عنصر زیرکونیوم در لایه میانی فعال لحیم‌کاری، با استفاده از لایه میانی چندجزئی طراحی شد. اتصال آلومینا به مس با استفاده از لایه‌های میانی فعال Ag-Cu-Ti-Sn و Ag-Cu-Ti-Sn-%5.1Zr با استفاده از روش لحیم‌کاری سخت القایی بررسی شد. اتصالات آلومینا به مس با لایه‌های میانی فعال Ag-Cu-Ti-Sn و Ag-Cu-Ti-Sn-%5.1Zr به‌ترتیب در دماهای 840 و 880 درجه سانتی‌گراد به مدت 15 دقیقه و در خلأ 6-10 میلی‌بار لحیم‌کاری شدند. ریزساختار اتصالات با استفاده از میکروسکوپ‌های نوری و الکترونی روبشی مجهز به آنالیز پراکندگی انرژی و خواص مکانیکی اتصالات با استفاده از آزمون استحکام برشی و آزمون ریزسختی ویکرز ارزیابی شدند. در اتصال آلومینا به مس با لایه میانی Ag-Cu-Ti-Sn، دو فاز TiO و Cu3Ti3O در ناحیه لایه واکنشی و ترکیبات یوتکتیک Ag-Cu پایه مس در ناحیه لحیم‌کاری، یافت شدند. در اتصال آلومینا به مس با لایه میانی Ag-Cu-Ti-Sn-%5.1Zr، دو فاز TiO و ZrO2 در ناحیه لایه واکنشی و دو فاز غنی از مس و نقره در ناحیه لحیم‌کاری مشاهده شد. استحکام برشی در اتصال لحیم‌کاری شده با لایه میانی Ag-Cu-Ti-Sn-%5.1Zr، 33 درصد بیشتر از اتصال لحیم‌کاری شده با لایه میانی Ag-Cu-Ti-Sn به‌دست آمد. ریزسختی در ناحیه لایه واکنشی اتصال با لایه میانی حاوی 5/1 درصد وزنی زیرکونیوم و بدون زیرکونیوم به‌ترتیب 248 و 146 ویکرز اندازه‌گیری شد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigating the Properties and Behavior of Ag-Cu-Ti-Sn-%5.1 Zr Filler Metal in Dissimilar Bonding of Alumina to Copper

نویسندگان [English]

  • M. Taheri 1
  • Gh. Azimi Roeen 2
  • A. Bahrami 1
1 Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
2 Center of Engineering and Technical Skills Training, Isfahan University of Technology, Isfahan 84156-83111, Iran
چکیده [English]

This study was intended to investigate the synergistic effect of zirconium element on the active filler metal, using a multi-component filler alloy. The bonding of alumina to copper was investigated using active filler metals, namely Ag-Cu-Ti-Sn and Ag-Cu-Ti-Sn-%5.1Zr, using the induction brazing method. Alumina/copper joining was done with active filler metals of Ag-Cu-Ti-Sn and Ag-Cu-Ti-Sn-%5.1Zr at temperatures of 840 and 880 °C, respectively, for 15 min under vacuum of 10-6 millibar. The microstructure of the joints were assessed using optical and scanning electron microscopes, equipped with energy dispersive spectroscopy and the mechanical properties of the joints were evaluated using the shear strength and the Vickers microhardness tests. Two phases of TiO and Cu3Ti3O were detected in the reaction layer area in alumina-copper joint with Ag-Cu-Ti-Sn filler metal. Ag-Cu eutectic compounds were also found in the brazing zone. In alumina-copper joint with Ag-Cu-Ti-Sn-%5.1Zr filler metal, two phases of TiO and ZrO2 were observed in the reaction layer area, and two phases rich in copper and silver were observed in the brazing zone. The shear strength, obtained in brazing joint with Ag-Cu-Ti-Sn-%5.1Zr filler, was 33% higher than that of in the brazing joint with Ag-Cu-Ti-Sn filler. The microhardness in the region of the reaction layer of the joint with filler metal containing 5.1 wt.% of zirconium and that without zirconium was measured as 248 and 146 Vickers, respectively.

کلیدواژه‌ها [English]

  • Active filler metal
  • Induction Brazing
  • Alumina
  • Microstructure
  • Mechanical properties

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مواد پیشرفته در مهندسی
دوره 44، شماره 1
دی 1403
صفحه 15-30

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