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Title: Joining of Tungsten Armor Using Functional Gradients

Abstract

The joining of low thermal expansion armor materials such as tungsten to high thermal expansion heat sink materials has been a major problem in plasma facing component (PFC) development. Conventional planar bonding techniques have been unable to withstand the high thermal induced stresses resulting from fabrication and high heat flux testing. During this investigation, innovative functional gradient joints produced using vacuum plasma spray forming techniques have been developed for joining tungsten armor to copper alloy heat sinks. A model was developed to select the optimum gradient architecture. Based on the modeling effort, a 2mm copper rich gradient was selected. Vacuum plasma pray parameters and procedures were then developed to produce the functional gradient joint. Using these techniques, dual cooling channel, medium scale mockups (32mm wide x 400mm length) were produced with vacuum plasma spray formed tungsten armor. The thickness of the tungsten armor was up to 5mm thick. No evidence of debonding at the interface between the heat sink and the vacuum plasma sprayed material was observed.

Authors:
Publication Date:
Research Org.:
Plasma Processes, Inc.
Sponsoring Org.:
USDOE - Office of Energy Research (ER)
OSTI Identifier:
896793
Report Number(s):
DE-FG02-96ER82257
TRN: US1002170
DOE Contract Number:  
FG02-96ER82257
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 42 ENGINEERING; ARCHITECTURE; ARMOR; BONDING; COPPER; COPPER ALLOYS; FABRICATION; FUNCTIONALS; HEAT FLUX; HEAT SINKS; PLASMA; SIMULATION; STRESSES; TESTING; THERMAL EXPANSION; THICKNESS; TUNGSTEN

Citation Formats

John Scott O'Dell. Joining of Tungsten Armor Using Functional Gradients. United States: N. p., 2006. Web. doi:10.2172/896793.
John Scott O'Dell. Joining of Tungsten Armor Using Functional Gradients. United States. doi:10.2172/896793.
John Scott O'Dell. Sun . "Joining of Tungsten Armor Using Functional Gradients". United States. doi:10.2172/896793. https://www.osti.gov/servlets/purl/896793.
@article{osti_896793,
title = {Joining of Tungsten Armor Using Functional Gradients},
author = {John Scott O'Dell},
abstractNote = {The joining of low thermal expansion armor materials such as tungsten to high thermal expansion heat sink materials has been a major problem in plasma facing component (PFC) development. Conventional planar bonding techniques have been unable to withstand the high thermal induced stresses resulting from fabrication and high heat flux testing. During this investigation, innovative functional gradient joints produced using vacuum plasma spray forming techniques have been developed for joining tungsten armor to copper alloy heat sinks. A model was developed to select the optimum gradient architecture. Based on the modeling effort, a 2mm copper rich gradient was selected. Vacuum plasma pray parameters and procedures were then developed to produce the functional gradient joint. Using these techniques, dual cooling channel, medium scale mockups (32mm wide x 400mm length) were produced with vacuum plasma spray formed tungsten armor. The thickness of the tungsten armor was up to 5mm thick. No evidence of debonding at the interface between the heat sink and the vacuum plasma sprayed material was observed.},
doi = {10.2172/896793},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Dec 31 00:00:00 EST 2006},
month = {Sun Dec 31 00:00:00 EST 2006}
}

Technical Report:

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