Effect of uniaxial pressure on ultrasound velocities and elastic moduli in plasma sprayed ceramics

0212391 - UT-L 20030108 RIV US eng J - Článek v odborném periodiku
Landa, Michal - Kroupa, František - Neufuss, Karel - Urbánek, Přemysl
Effect of uniaxial pressure on ultrasound velocities and elastic moduli in plasma sprayed ceramics.
Journal of Thermal Spray Technology. Roč. 12, č. 2 (2003), s. 226-233. ISSN 1059-9630. E-ISSN 1544-1016
Grant CEP: GA ČR GA106/00/D106; GA ČR GA106/01/0094
Výzkumný záměr: CEZ:AV0Z2043910; CEZ:AV0Z2076919
Klíčová slova: compressive stressed * elastic stiffnesses * plasma-sprayed ceramics
Kód oboru RIV: JH - Keramika, žáruvzdorné materiály a skla
Impakt faktor: 0.726, rok: 2003

Microcrackt and thin voids in plasma- sprayed ceramics are known to be responsible for elastic anisotropy and for small values of elastic stiffness constants (measured at small stresses), compared with well-sintered materials. The increase of ultrasound velocities with increasing uniaxial pressure up to 300 MPa in three tzpes of plasma-sprayed ceramics was measured in two directions. The corresponding elastic stiffnesses increased from 1.4 to 4.7 times. The experimental results were explained by closing of intrasplat microcracks and interpsplat thin voids by uniaxial pressure.
Trvalý link: http://hdl.handle.net/11104/0107939