中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 36 No. 1 January 2026 |
（a State Key Laboratory of Precision Welding & Joining of Materials and Structures, Harbin Institute of Technology, Harbin 150001, China;
b Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology, Weihai 264209, China;
c Beijing Institute of Control Engineering, Beijing 100190, China）
Abstract:The Sn-2Al filler metal was utilized to bond W90 tungsten heavy alloys by the ultrasonic-assisted coating technology in atmospheric environment at 250 °C. The effects of ultrasonic power and ultrasonic time on microstructure and interfacial strength of Sn-2Al/W90 interface were investigated. The ultrasound improved the wettability of Sn-2Al filler metal on W90 surface. As the ultrasonic power increased and ultrasonic time increased, the size of Al phase in seam decreased. The maximum value of Sn-2Al/W90 interfacial strength reached 30.1 MPa. Based on the acoustic pressure simulation and bubble dynamics, the intensity of cavitation effect was proportional to ultrasonic power. The generated high temperature and high pressure by cavitation effect reached 83799.6 K and 1.26×1014 Pa, respectively.
Key words: W-Ni-Fe alloy; Sn-Al filler metal; ultrasonic-assisted coating technology; acoustic pressure; cavitation; bubble dynamics
