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| Abstract No.: |
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Scheduled at:
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Tuesday, June 21, 2022, Saal Brüssel 2:20 PM
Advanced filler alloys
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| Title: |
Properties and applicability of Ni nanopastes for structural joining as an alternative to conventional braze fillers
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| Authors: |
Benjamin Sattler* / Chemnitz University of Technology, Germany
Susann Hausner / Professur Verbundwerkstoffe und Werkstoffverbunde, Technische Universität Chemnitz, Deutschland
Guntram Wagner/ Professur Verbundwerkstoffe und Werkstoffverbunde, Technische Universität Chemnitz, Deutschland
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| Abstract: |
The physical characteristics of nano-sized particles lead to lower melting and sintering temperatures than those of the corresponding bulk material. Thus, no melting point depressants such as boron or silicon in Ni braze fillers are required in order to achieve sufficiently low joining temperatures and the issue of brittle intermetallic phase formation can be avoided. In order to employ nanoparticles in joining applications, they have to be processed to suspensions, e. g. pastes. In this work a series of pastes with Nickel nano particles (Ni nanopastes) based on different mean particle diameters and different organic ingredients were prepared by using ultrasound-enhanced dispersing. With these pastes, samples are produced by inductive heating under controlled atmospheres, which are used for microstructural analysis and mechanical examinations. Results for processing properties, metal content and simultaneous DSC/TG are shown, as well as achievable joining strengths and microstructure of the joints.
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