FACTORS AFFECTING THERMAL SHOCK RESISTANCE OF POLYPHASE CERAMIC BODIES

Technical Report · Thu Feb 01 04:00:00 EST 1962

OSTI ID:4805741

Hasselman, D P.H.; Shaffer, P T.B.

An investigation of the factors which affect the thermal shock resistance of polyphase ceramic systems was conducted using the model system zirconium carbide-graphite. The effect of graphite on the physical properties of the zirconium carbide is to increase the strain at fracture, thermal conductivity, and thermal diffusivity thereby increasing thermal shock resistance. Of significance is the observation that the presence of the graphite substantially reduces the damage which results from thermal shock. Explanations are given and suitable thermal shock damage resistance parameters are introduced. Emissivity was introduced as a variable affecting thermal shock resistance when radiation is the principal mechanism of heat transfer. A quantitative theory for thermal shock by radiation on heating was developed and confirmed experimentally. (auth)

• Research Organization: Carborundum Co., Niagara Falls, N.Y.
• NSA Number: NSA-16-024176
• OSTI ID: 4805741
• Report Number(s): WADD-TR-60-749(Pt.II)
• Country of Publication: United States
• Language: English

Related Subjects

CERAMICS
EMISSION
FAILURES
GRAPHITE
HEAT TRANSFER
HEATING
METALS, CERAMICS, AND OTHER MATERIALS
PHASE DIAGRAMS
RADIATIONS
STANDARDS
TENSILE PROPERTIES
THERMAL CONDUCTIVITY
THERMAL DIFFUSION
THERMAL STRESSES
ZIRCONIUM CARBIDES