Thermal stress analysis of fused-cast AZS refractories during production; Part 2: Development of thermo-elastic stress model

Journal Article · Wed Jun 01 00:00:00 EDT 1994 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1994.tb09750.x· OSTI ID:7268534

Cockcroft, S L; Brimacombe, J K ^[1]; Walrod, D G; Myles, T A ^[2]

---

1. Univ. of British Columbia, Vancouver, British Columbia (Canada). Centre for Metallurgical Process Engineering
2. Carborundum Co., Falconer, NY (United States). Monofrax-S Plant

Mathematical models of heat flow and thermo-elastic stress, based on the finite-element method, have been developed and utilized to analyze the voidless,'' fused-cast, AZS, solidification process. The results of the mathematical analysis, in conjunction with information obtained in a comprehensive industrial study, presented in Part 1 of this paper, describe the mechanisms for the formation of the various crack types found in the fused-cast product. Thermal stresses are generated early in the solidification process by rapid cooling of the refractory surface as it contacts the initially cool mold and later in conjunction with the tetragonal-to-monoclinic phase transformation which occurs in the zirconia component of the AZS refractory. Applying this model, castings were made using a revised mold design. Preliminary results indicate these castings to be free of objectionable transverse cracks.

• OSTI ID: 7268534
• Journal Information: Journal of the American Ceramic Society; (United States), Vol. 77:6; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
CASTING
CRACKS
SOLIDIFICATION
SILICON OXIDES
ZIRCONIUM OXIDES
CRYSTAL-PHASE TRANSFORMATIONS
MATHEMATICAL MODELS
THERMAL STRESSES
ALUMINIUM COMPOUNDS
CHALCOGENIDES
FABRICATION
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
SILICON COMPOUNDS
STRESSES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies
360203 - Ceramics
Cermets
& Refractories- Mechanical Properties