Brazing development and interfacial metallurgy study of tungsten and copper joints with eutectic gold copper brazing alloy

David Easton; Yuxuan Zhang; James Wood; Alexander Galloway; Mikael Olsson Robbie; Christopher Hardie

doi:10.1016/j.fusengdes.2015.05.033

Brazing development and interfacial metallurgy study of tungsten and copper joints with eutectic gold copper brazing alloy

David Easton^*, Yuxuan Zhang, James Wood, Alexander Galloway, Mikael Olsson Robbie, Christopher Hardie

^*Corresponding author for this work

Mechanical And Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

231 Downloads (Pure)

Abstract

Current proposals for the divertor component of a thermonuclear fusion reactor include tungsten and copper as potentially suitable materials. This paper presents the procedures developed for the successful brazing of tungsten to oxygen free high conductivity (OFHC) copper using a fusion appropriate gold based brazing alloy, Orobraze 890 (Au80Cu20). The objectives were to develop preparation techniques and brazing procedures in order to produce a repeatable, defect free butt joint for tungsten to copper. Multiple brazing methods were utilised and brazing parameters altered to achieve the best joint possible. Successful and unsuccessful brazed specimens were sectioned and analysed using optical and scanning electron microscopy, EDX analysis and ultrasonic evaluation. It has been determined that brazing with Au80Cu20 has the potential to be a suitable joining method for a tungsten to copper joint.

Original language	English
Pages (from-to)	1956-1959
Number of pages	4
Journal	Fusion Engineering and Design
Volume	98-99
Early online date	21 Jun 2015
DOIs	https://doi.org/10.1016/j.fusengdes.2015.05.033
Publication status	Published - Oct 2015
Event	28th Symposium on Fusion Technology (SOFT 2014) - San Sebastian, Spain Duration: 29 Sept 2014 → 3 Oct 2014

Keywords

brazing
characterisation
copper
dissimilar
material
tungsten

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Easton-etal-FusEngDes-2015-Brazing-development-metallurgy-study-of-tungsten-copper-joints-with-eutectic-gold-copper-brazing-alloy
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@article{290bf43cc2c145fcb33bd6dde3628c18,

title = "Brazing development and interfacial metallurgy study of tungsten and copper joints with eutectic gold copper brazing alloy",

abstract = "Current proposals for the divertor component of a thermonuclear fusion reactor include tungsten and copper as potentially suitable materials. This paper presents the procedures developed for the successful brazing of tungsten to oxygen free high conductivity (OFHC) copper using a fusion appropriate gold based brazing alloy, Orobraze 890 (Au80Cu20). The objectives were to develop preparation techniques and brazing procedures in order to produce a repeatable, defect free butt joint for tungsten to copper. Multiple brazing methods were utilised and brazing parameters altered to achieve the best joint possible. Successful and unsuccessful brazed specimens were sectioned and analysed using optical and scanning electron microscopy, EDX analysis and ultrasonic evaluation. It has been determined that brazing with Au80Cu20 has the potential to be a suitable joining method for a tungsten to copper joint.",

keywords = "brazing, characterisation, copper, dissimilar, material, tungsten",

author = "David Easton and Yuxuan Zhang and James Wood and Alexander Galloway and Robbie, {Mikael Olsson} and Christopher Hardie",

year = "2015",

month = oct,

doi = "10.1016/j.fusengdes.2015.05.033",

language = "English",

volume = "98-99",

pages = "1956--1959",

journal = "Fusion Engineering and Design",

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note = "28th Symposium on Fusion Technology (SOFT 2014) ; Conference date: 29-09-2014 Through 03-10-2014",

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AU - Easton, David

AU - Zhang, Yuxuan

AU - Wood, James

AU - Galloway, Alexander

AU - Robbie, Mikael Olsson

AU - Hardie, Christopher

PY - 2015/10

Y1 - 2015/10

N2 - Current proposals for the divertor component of a thermonuclear fusion reactor include tungsten and copper as potentially suitable materials. This paper presents the procedures developed for the successful brazing of tungsten to oxygen free high conductivity (OFHC) copper using a fusion appropriate gold based brazing alloy, Orobraze 890 (Au80Cu20). The objectives were to develop preparation techniques and brazing procedures in order to produce a repeatable, defect free butt joint for tungsten to copper. Multiple brazing methods were utilised and brazing parameters altered to achieve the best joint possible. Successful and unsuccessful brazed specimens were sectioned and analysed using optical and scanning electron microscopy, EDX analysis and ultrasonic evaluation. It has been determined that brazing with Au80Cu20 has the potential to be a suitable joining method for a tungsten to copper joint.

AB - Current proposals for the divertor component of a thermonuclear fusion reactor include tungsten and copper as potentially suitable materials. This paper presents the procedures developed for the successful brazing of tungsten to oxygen free high conductivity (OFHC) copper using a fusion appropriate gold based brazing alloy, Orobraze 890 (Au80Cu20). The objectives were to develop preparation techniques and brazing procedures in order to produce a repeatable, defect free butt joint for tungsten to copper. Multiple brazing methods were utilised and brazing parameters altered to achieve the best joint possible. Successful and unsuccessful brazed specimens were sectioned and analysed using optical and scanning electron microscopy, EDX analysis and ultrasonic evaluation. It has been determined that brazing with Au80Cu20 has the potential to be a suitable joining method for a tungsten to copper joint.

KW - brazing

KW - characterisation

KW - copper

KW - dissimilar

KW - material

KW - tungsten

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VL - 98-99

SP - 1956

EP - 1959

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

T2 - 28th Symposium on Fusion Technology (SOFT 2014)

Y2 - 29 September 2014 through 3 October 2014

ER -

Brazing development and interfacial metallurgy study of tungsten and copper joints with eutectic gold copper brazing alloy

Abstract

Keywords

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