@article{45294b8f2e124f5480324b0864a51c0b,
title = "Thermochemical model on the carbothermal reduction of oxides during spark plasma sintering of zirconium diboride",
abstract = " Carbon was used to reduce oxides in spark plasma sintered ZrB 2 ultra‐high temperature ceramics. A thermodynamic model was used to evaluate the reducing reactions to remove B 2 O 3 and ZrO 2 from the powder. Powder oxygen content was measured and carbon additions of 0.5 and 0.75 wt% were used. A C-ZrO 2 pseudo binary diagram, ZrO 2 -B2O 3 -C pseudo ternaries, and Zr-C-O potential phase diagrams were generated to show how the reactions can be related to an open system experiment in the tube furnace. Scanning transmission electron microscopy identified impurity phases composed of amorphous Zr-B-O with lamellar BN and a Zr-C-O ternary model was calculated under SPS sintering conditions at 1900°C and 6 Pa to understand how oxides can be retained in the microstructure. ",
keywords = "Field Assisted Sintering Technology (FAST), Phase diagrams, Spark plasma sintering, Ultra-high temperature ceramics",
author = "David Pham and Dycus, {Joseph H.} and Lebeau, {James M.} and Manga, {Venkateswara R.} and Krishna Muralidharan and Corral, {Erica L.}",
note = "Funding Information: This research is funded by an Air Force Office of Scientific Research Multidisciplinary University Research Initiative (AFOSR‐MURI) Program Award under Grant Number FA9550‐10‐1‐0563, AFRL contract number FA9453‐17‐1‐ 0085, and National Science Foundation Early Faculty Career Award-Division of Materials Research Under Award Number 0954110. The authors acknowledge the use of the Analytical Instrumentation Facility (AIF) at North Carolina State University, which is supported by the State of North Carolina and the National Science Foundation. Funding Information: National Science Foundation Graduate Research Fellowship, Grant/Award Number: DGE-1252376; Air Force Office of Scientific Research Multidisciplinary University Research Initiative (AFOSR-MURI), Grant/Award Number: FA9550-10-1-0563; Air Force Research Lab, Grant/Award Number: FA9453-17-1-0085 Publisher Copyright: {\textcopyright} 2018 The American Ceramic Society.",
year = "2018",
doi = "10.1111/jace.15911",
language = "English (US)",
volume = "102",
journal = "Journal of the American Ceramic Society",
issn = "0002-7820",
publisher = "Wiley-Blackwell",
number = "2",
}