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}
}