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Article
Microstructure and Its Physicochemical Basis for the White Porcelain from Gongyi Kiln of Henan Province in China
Gongyi is the birthplace and one of the most famous production areas of white porcelain in China. In this study, white porcelain samples from the Northern Wei to Tang Dynasties excavated from Baihe and Huangye...
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Article
Effects of microstructural evolution on the thermal conductivity of α–Al2O3 prepared from nano-size γ–Al2O3 powder
The thermal diffusivities (D) of porous α–Al2O3 specimens prepared from nano-size γ–Al2O3 powder and from conventional submicrometer-size alumina powders were measured at room temperature, and the thermal conduct...
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Article
Thermal diffusivity maps: Case studies in ceramics
A new methodology for map** thermal diffusivity using a photothermal deflection method is introduced. Two case studies are made: fiber-reinforced composite structures and contact damage zones in alumina. In ...
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Article
Effect of mechanical damage on thermal conduction of plasma-sprayed coatings
A thermal wave methodology for monitoring the thermal conduction of ceramic coatings with accumulating mechanical damage is described. Tests are conducted on a model alumina coating containing laminar defect i...
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Article
Thermal wave analysis of contact damage in ceramics: Case study on alumina
Thermal waves are used to image damage accumulation digitally beneath Hertzian contacts in ceramics. Alumina ceramics over a range of grain size 3–48 μm are used in a case study. The nature of the images changes ...
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Article
Grinding force and microcrack density in abrasive machining of silicon nitride
The relationship between grinding forces and the material’s resistance to microfracture is investigated in abrasive machining of silicon nitride ceramics. Surface grinding is performed on two forms of silicon ...
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Article
Damage accumulation and cyclic fatigue in Mg-PSZ at Hertzian contacts
Hertzian contact damage in as-fired, peak-aged, and over-aged Mg-PSZ is studied, in single-cycle and multiple-cycle loading. Indentation stress-strain curves reveal a monotonically increasing quasi-plasticity ...
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Article
Heat conduction in silicon thin films: Effect of microstructure
A study was made of the thermal properties of low pressure chemical vapor deposition (LPCVD) silicon thin films with amorphous and polycrystalline microstructures, produced by varying the substrate temperature...