@book{54d43836f31245eea9f9e1c59e9841bb,
title = "Strength and integrity of ceramic coatings",
abstract = "The stiffness, stresses and integrity of structures with porous ceramic coatings have been considered in bending. The performance in comparison with that of bulk ceramic material, the failure criteria as well as appropriate testing methods are discussed. A consequence of the low stiffness of porous ceramic layers is that the Young's modulus and elastic stresses are rarely obtained with sufficient accuracy from bending tests. Ultrasonic testing appears to provide a convenient and nondestructive way of assessing Young's modulus, with the possible additional advantage of information on anisotropy. Ultrasonic testing in C-scan mode is also sensitive to defects originating and developing in the coating. The fracture toughness of a natural granite in the weakest orientation was shown to be 1.2 ± 0.05 MPa square root m, or about half of the typical reported values at random orientation.",
keywords = "porous materials, ceramics, ceramic coatings, materials tests, mechanical tests, mechanical properties, bending, bend tests, bend properties, stiffnes, stresses, test methods, nondestructive tests, ultrasonic tests, modulus of elasticity, failure, defects, anisotropy, aluminum oxide, granite",
author = "Pertti Auerkari and Pentti Kauppinen and Kari Santaoja and Tero Uuttu",
year = "1991",
language = "English",
isbn = "951-38-3982-6",
series = "Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports",
publisher = "VTT Technical Research Centre of Finland",
number = "734",
address = "Finland",
}