Accession Number:

ADP007751

Title:

Microwave Synthesis of Metal Carbides,

Descriptive Note:

Corporate Author:

CALIFORNIA UNIV LOS ANGELES DEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s):

• Kozuka, Hiromitsu
• Mackenzie, John D.

Report Date:

1992-04-27

Pagination or Media Count:

8.0

Abstract:

Microwave heating of metal oxide graphite or glassy carbon powder mixtures was carried out in Ar, utilizing a commercial microwave oven operated at 2.45 GHz and 700 W. Temperatures of up to 1400 - 1500 deg C could be obtained within 13 min, and Silicon carbide, Titanium carbide, Niobium carbide and Tantalum carbide were formed within 20 min. This method was also shown to offer a new process for producing SiC whiskers. Not only the amount of carbon but also the compactness of the starting powders was found to be essential for heating efficiency.

Descriptors:

• *METALS
• *MICROWAVES
• *CARBIDES
• *CERAMIC MATERIALS
• CARBON
• EFFICIENCY
• GLASSY CARBON
• GRAPHITE
• HEATING
• MICROWAVE OVENS
• MIXTURES
• OVENS
• OXIDES
• POWDERS
• TEMPERATURE
• ARGON
• POWDER ALLOYS
• SILICON CARBIDES
• WHISKERS(CRYSTALS)
• RADIATION ABSORPTION
• COMPOSITE MATERIALS
• FIRING(CERAMICS)
• DIFFRACTION
• SYMPOSIA

Subject Categories:

• Ceramics, Refractories and Glass
• Laminates and Composite Materials
• Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE