Application of Ultrasonic Waves during Alumina/Metals Brazing

Khalid M. HAFEZ; Mohamed Hanafy EL-SAYED; Masaaki NAKA

doi:10.14852/jcersjsuppl.112.0.S1104.0

Journal of the Ceramic Society of Japan, Supplement 112-1, PacRim5 Special Issue

Session ID : 15

DOI https://doi.org/10.14852/jcersjsuppl.112.0.S1104.0

Conference information

Host: The Ceramic Society of Japan

Co-host: Iketani Science and Technology Foundation, International Ceramic Federation, Commemorative Organization for the Japan World Exposition '70, The American Ceramic Society, The Australasian Ceramic Society, The Chinese Ceramic Society, The Korean Ceramic Society, Joint Research Consortium of Synergy Ceramics/Fine Ceramics Research Association, Nanotechnology Researchers Network Center of Japan, The Special Coordination Funds for Promoting Science and Technology, Japan National Tourist Organization, Aichi Prefectural Government, CASIO SCIENCE PROMOTION FOUNDATION, DAIKO FOUNDATION, Nagoya Convention and Visitors Bureau, The Asahi Glass Foundation, The Kao Foundation For Arts And Sciences, The Murata Science Foundation, The Ogasawara Foundation for the Promotion of Science & Engineering, ASAHI GLASS CO., LTD. Research Center, CENTRAL GLASS CO., LTD., ELECTRIC GLASS INDUSTRY ASSOCIATION OF JAPAN (EGAJ), Hattori Company, Ltd., Hitachi Research Laboratory, Hitachi, Ltd., HOYA CORPORATION, INAX Corporation, ITOCHU CERATECH CORP., Japan Cement Association, KYOCERA Corporation, KYUSHU REFRACTORIES CO., LTD., MINO CERAMIC CO., LTD., Murata Manufacturing Co., Ltd., NGK INSULATORS LTD., NGK SPARK PLUG CO., LTD., NICHIAS Corporation, NIKKO COMPANY, Nippon Electric Glass Co., Ltd., Nippon Sheet Glass Co., Ltd., NORITAKE CO., LIMITED, Tokuyama Corporation, TOTO LTD.

Papers

Application of Ultrasonic Waves during Alumina/Metals Brazing

Khalid M. HAFEZ, Mohamed Hanafy EL-SAYED, Masaaki NAKA

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Keywords: Brazing, Ceramic, Metal, Ultrasonic, Microstructure and Fracture strength

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Abstract

Ultrasonic waves was applied during brazing of alumina to different metals such as Ti, Ni, Nb, Fe, and AISI 304 stainless steel using the Zn-5 mass% Al brazing filler alloy. The intensity of ultrasonic wave was 1 kW and 18 kHz. Different reaction products were formed at the alumina-metals interfaces including solid solutions and intermetallic compounds. The ultrasonic waves enhance the wetting on the ceramic/filler and metal/filler interface. The alumina-Nb joints provided the best bond strength value among the different couples, since this is largely due to its low α*E-factor. The high mismatch in thermal coefficient between the brazing filler and the AISI 304 stainless caused a separation at the interface, and produced the weakest joint among the other couples.

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