Mechanical properties of polycrystalline lithium orthosilicate

Journal Article · Fri Sep 01 04:00:00 EDT 1989 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1989.tb06296.x· OSTI ID:7009030

Chu, C Y; Bar, K; Singh, J P; Goretta, K C; Billone, M C; Poeppel, R B; Routbort, J L ^[1]

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1. Argonne National Lab., IL (USA). Materials and Components Technology Div.

Room-temperature mechanical properties and high-temperature creep deformation of lithium orthosilicate (Li{sub 4}SiO{sub 4}) were studied. Elastic constants, flexural strength, and fracture toughness were determined for specimens with densities between 68% and 98% of theoretical. Critical quenching temperature and thermal-shock resistance parameters for 90% dense specimens were also measured. High-temperature creep deformation was investigated by a constant-strain-rate test in an argon atmosphere at temperatures between 750{degrees} and 1025{degrees}C and strain rates ranging from about 10{sup {minus} 6} to 10{sup {minus} 3} s{sup {minus} 1}. AT 950{degrees}C and above, the stress exponent, {ital n}, was determined to be 3.6, with a creep activation energy of 715 kJ/mol. Selected results obtained for Li{sub 4}SiO{sub 4} are compared with the results obtained for other Li-containing ceramics that are under consideration as candidates for fusion reactor breeder blankets.

• OSTI ID: 7009030
• Journal Information: Journal of the American Ceramic Society; (USA), Journal Name: Journal of the American Ceramic Society; (USA) Vol. 72:9; ISSN JACTA; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
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Cermets
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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700201 -- Fusion Power Plant Technology-- Blanket Engineering
ACTIVATION ENERGY
ALKALI METAL COMPOUNDS
ARGON
BREEDING BLANKETS
CREEP
CRYSTALS
DEFORMATION
ELEMENTS
ENERGY
FLUIDS
FRACTURE PROPERTIES
GASES
HIGH TEMPERATURE
LITHIUM COMPOUNDS
LITHIUM SILICATES
MATERIALS TESTING
MECHANICAL PROPERTIES
NONMETALS
NUCLEATION
OXYGEN COMPOUNDS
POLYCRYSTALS
RARE GASES
REACTOR COMPONENTS
SILICATES
SILICON COMPOUNDS
TESTING
THERMAL SHOCK