Topic
Thermal shock
About: Thermal shock is a research topic. Over the lifetime, 5012 publications have been published within this topic receiving 58954 citations.
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TL;DR: In this article, a systematic investigation of a series of Nd:YVO/sub 4/ crystals with different dopant concentrations is conducted to scale the performance of diode-end-pumped lasers to higher powers.
Abstract: A systematic investigation of a series of Nd:YVO/sub 4/ crystals with different dopant concentrations is conducted to scale the performance of diode-end-pumped lasers to higher powers. From the theoretical analysis, the fracture-limited pump power is expressed as a function of the thermal shock parameter, fractional thermal loading, and the absorption coefficient. The thermal shock parameter of Nd:YVO/sub 4/ crystals is determined from the laser experiments. Using the thermal shock parameter and the space-rate-equation model, we calculate the maximum output power in Nd:WO/sub 4/ crystals at the optimum pump condition as a function of the dopant concentration. The theoretical calculations are in good agreement with the experimental results. The influence of lowering the absorption coefficient on the TEM/sub 00/ output efficiency is also studied through the overlapping integral.
191 citations
TL;DR: In this article, the thermal fracture behavior of metal/ceramic functionally graded materials (FGMs) was evaluated by a well controlled burner heating method using a H2/O2 combustion flame, which simulated real environment.
187 citations
TL;DR: In this article, material microstructures are presented with a coefficient of thermal expansion larger in magnitude than that of either constituent. Thermal expansion can be large positive, zero, or large negative.
Abstract: Material microstructures are presented with a coefficient of thermal expansion larger in magnitude than that of either constituent. Thermal expansion can be large positive, zero, or large negative. Three-dimensional lattices with void space exceed two-phase bounds but obey three-phase bounds; lattices and normal materials have a trend of expansion decreasing with modulus. Two-phase composites with a negative stiffness phase exceed bounds that assume positive strain energy density. The author determined Young’s modulus and its relation to thermal expansion. Behavior of these composites is compared with that of homogeneous solids in expansion-modulus maps.
187 citations
TL;DR: In this article, the authors examined cracks in an ITER-reference tungsten grade under single thermal shock loading and found that the major cracks were generated due to the brittleness of the material and microcracks were formed in a process which was initiated by plastic deformation at high temperature.
179 citations
TL;DR: In this paper, the feasibility of fracture stimulation by using cryogenic fluids to create a strong thermal gradient generating local tensile stress in the rocks surrounding a borehole was investigated, and the results showed that increasing the number of cryogenic stimulations enhanced fracturing by both creating new cracks as well as widening the existing cracks.
177 citations