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Title: Microwave sintering of titanium diboride

Abstract

Titanium diboride was heated to high temperatures using microwaves. The highest temperature obtained was 2245/degree/C. Unfortunately, oxidation was a problem, especially at the higher temperatures, although an argon flush and a carbon getter were used. To completely stop oxidation, the oxygen potential must be below 10/sup /minus/18/ atmospheres. Using an argon flush and a carbon getter, titanium diboride was successfully densified to 82% of theoretical without measurable oxidation by heating with microwaves to 1860/degree/C. Density actually decreased upon reaching temperatures above 1860/degree/C due to void formation adjacent to the surface. Void formation is thought to be due to the formation of B/sub 2/O/sub 3/(g) which evolves rapidly above 1860/degree/C because of the loss of a TiO/sub 2/ protective film which melts at this temperature. 9 refs., 12 figs., 2 tabs.

Authors:
; ;
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
OSTI Identifier:
6361012
Report Number(s):
LA-UR-89-533; CONF-890130-2
Journal ID: ISSN 1940-6339; ON: DE89007988
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Journal Volume: 10; Conference: 13. annual conference on composites and advanced ceramics, Cocoa Beach, FL, USA, 15 Jan 1989; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; TITANIUM BORIDES; SINTERING; BORON OXIDES; DENSITY; MICROSTRUCTURE; MICROWAVE HEATING; OXIDATION; PHASE DIAGRAMS; STABILITY; VERY HIGH TEMPERATURE; VOIDS; BORIDES; BORON COMPOUNDS; CHALCOGENIDES; CHEMICAL REACTIONS; CRYSTAL STRUCTURE; DIAGRAMS; FABRICATION; HEATING; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication; 360202 - Ceramics, Cermets, & Refractories- Structure & Phase Studies

Citation Formats

Katz, J D, Blake, R D, and Scherer, C P. Microwave sintering of titanium diboride. United States: N. p., 1989. Web. doi:10.1002/9780470310557.ch38.
Katz, J D, Blake, R D, & Scherer, C P. Microwave sintering of titanium diboride. United States. https://doi.org/10.1002/9780470310557.ch38
Katz, J D, Blake, R D, and Scherer, C P. 1989. "Microwave sintering of titanium diboride". United States. https://doi.org/10.1002/9780470310557.ch38. https://www.osti.gov/servlets/purl/6361012.
@article{osti_6361012,
title = {Microwave sintering of titanium diboride},
author = {Katz, J D and Blake, R D and Scherer, C P},
abstractNote = {Titanium diboride was heated to high temperatures using microwaves. The highest temperature obtained was 2245/degree/C. Unfortunately, oxidation was a problem, especially at the higher temperatures, although an argon flush and a carbon getter were used. To completely stop oxidation, the oxygen potential must be below 10/sup /minus/18/ atmospheres. Using an argon flush and a carbon getter, titanium diboride was successfully densified to 82% of theoretical without measurable oxidation by heating with microwaves to 1860/degree/C. Density actually decreased upon reaching temperatures above 1860/degree/C due to void formation adjacent to the surface. Void formation is thought to be due to the formation of B/sub 2/O/sub 3/(g) which evolves rapidly above 1860/degree/C because of the loss of a TiO/sub 2/ protective film which melts at this temperature. 9 refs., 12 figs., 2 tabs.},
doi = {10.1002/9780470310557.ch38},
url = {https://www.osti.gov/biblio/6361012}, journal = {},
issn = {1940-6339},
number = ,
volume = 10,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1989},
month = {Sun Jan 01 00:00:00 EST 1989}
}

Conference:
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