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论文类型：期刊论文

发表时间：2017-07-05

发表刊物：MATERIALS & DESIGN

收录刊物：SCIE、EI、Scopus

卷号：125

页面范围：55-61

ISSN号：0264-1275

关键字：Divertor; Tungsten; RAFM steel; Brazing; Alloy design

摘要：The effective joining of tungsten and reduced activation ferritic-martensitic (RAFM) steels is crucial to fabrication of the divertor components of fusion reactors. In the presentwork, a lowneutron-activation filler metal system of Ti-Fe-Sn was designed to realize the so-called exothermic-reaction-assisted brazing. A series of three-layered Ti-Fe- Sn thin film assemblies were made by electroplating, which allowed the brazing of tungsten with a CLF-1 RAFM steel to be carried out at a temperature as low as 1090 degrees C. The joint structures made from the Sn-bearing filler metals demonstrated high strength and high resistance against thermocycling. The Sn-film layer in the filler assembly has delivered favorable alloying effects on depressing separation of Ti element in the W grain boundaries and the formation of pores, and on microstructure refinement in the brazed joints as well. (C) 2017 Elsevier Ltd. All rights reserved.