(Carbides, Ceramics and Glass Materials)
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The successful application of high performance ceramics in such demanding applications as turbine engines and other energy conversation systems depends upon utilization of better design methodology... (View Full Article)
(Carbides, Ceramics and Glass Materials)
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The expected use of sintered alpha silicon carbide in structural elements of high performance machinery requires a basic understanding of the fracture process and reliable application data. Five of... (View Full Article)
(Carbides, Ceramics and Glass Materials)
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Knoop-indented as well as machined 4-point flexure stress-rupture experiments were conducted with sintered alpha silicon carbide at 1200?C, 1400?C, and 1500?C in are. The stress-rupture curve... (View Full Article)
(Carbides, Ceramics and Glass Materials)
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The slow crack growth parameters obtained by different experimental methods for silicon carbide ceramics are critically reviewed for their significance. It is shown that in environments resistant to... (View Full Article)
(Carbides, Ceramics and Glass Materials)
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Recent advances in the design and life prediction methodologies of brittle materials have dealt primarily with the probabilistic nature of tensile strengths of materials as well as with time-dependent... (View Full Article)
(Carbides, Ceramics and Glass Materials)
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Sintered alpha silicon carbides are being developed to meet the requirements of conventional and advanced heat engine systems. Though pressure-less sintering, low cost, near-net complex shapes... (View Full Article)
(Carbides, Ceramics and Glass Materials)
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A self-consistent, single valued representation of the major physical, mechanical, and thermal properties of (alpha-symbol)-SIC is presented.... (View Full Article)
(Carbides, Ceramics and Glass Materials)
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During recent years the increased interest in ceramics as high temperature structural materials has resulted from both the need for greater energy conversion system efficiencies, and the development... (View Full Article)
(Carbides, Ceramics and Glass Materials)
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The flexural strength, fracture toughness and sonic Young's modulus were determined for sintered alpha silicon carbide consisting of various amounts of background porosity and different grain sizes.... (View Full Article)
(Carbides, Ceramics and Glass Materials)
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An attempt to apply three-dimensional flaw models to characterize fracture origins in sintered alpha silicon carbide is made. Some general improvements in the intrinsic flaw fractography results are... (View Full Article)
(Carbides, Ceramics and Glass Materials)
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Ceramic materials generally lack ductility and toughness, and exhibit varability in properties. In order to design with ceramic materials, the variation in material properties, especially strength,... (View Full Article)
(Carbides, Ceramics and Glass Materials)
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An analysis of the effect of proof stressing on the strength of brittle materials has been derived based on the possibility of slow crack growth during proof testing.... (View Full Article)
(Carbides, Ceramics and Glass Materials)
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Alpha silicon carbide billets, 98% of theoretical density, were formed by cold pressing and sintering. One half of this fine grain sintered material was further heat treated to induce exaggerated... (View Full Article)
(Carbides, Ceramics and Glass Materials)
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The questions of the substitution of ceramics for metals has been widely discussed at all levels of the scientific materials community including governmental agencies, academic institutions, energy... (View Full Article)
(Carbides, Ceramics and Glass Materials)
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This paper is concerned with procedural developments for the application of single edge notched beams (SENB) and indentation techniques to determine the fracture toughness of sintered alpha silicon... (View Full Article)
(Carbides, Ceramics and Glass Materials)
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Sintered alpha SiC is being developed to meet the requirements for an advanced engine material. Flexural strength was studied as a function of temperature, atmosphere and stressing rate.... (View Full Article)
(Carbides, Ceramics and Glass Materials)
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It is well recognized that surface and near-surface flaws control the strength of the majority of specimens from a population of sintered alpha-carbide test bars. An investigation was carried out to... (View Full Article)