@inproceedings{542344412ecb4f7ba78488fa5a84556e,
title = "SPS fabrication of tungsten-rhenium alloys in support of NTR fuels development",
abstract = "Tungsten metal slugs were fabricated via Spark Plasma Sintering (SPS) of powdered metals at temperatures ranging from 1575 K to 1975 K and hold times of 5 minutes to 30 minutes, using powders with an average diameter of 7.8 μm. Sintered tungsten specimens were found to have relative densities ranging from 83% to 94% of the theoretical density for tungsten. Consolidated specimens were also tested for their Vickers Hardness Number (VHN), which were plotted as a function of relative density. Concurrently, tungsten and rhenium powders with average respective diameters of 0.5 μm and 13.3 μm were pre-processed either by High-Energy-Ball-Milling (HEBM) or by homogeneous mixing to yield W-25at.%Re mixtures. The powder batches were sintered at temperatures of 1975 K and 2175 K for hold times up to 60 minutes yielding relative densities in the range 94% to 97%. The combination of HEBM and sintering showed a significant decrease in the intermetallic phases compared to that of the homogenous mixing and sintering.",
keywords = "Nuclear propulsion, Space reactors, Spark plasma sintering, Tungsten alloys",
author = "Webb, {Jonathan A.} and Indrajit Charit and Cory Sparks and Butt, {Darryl P.} and Megan Frary and Mark Carroll",
year = "2011",
language = "English",
isbn = "9781617828461",
series = "Nuclear and Emerging Technologies for Space 2011, NETS-2011",
pages = "642--648",
booktitle = "Nuclear and Emerging Technologies for Space 2011, NETS-2011",
note = "Nuclear and Emerging Technologies for Space 2011, NETS-2011 ; Conference date: 07-02-2011 Through 10-02-2011",
}