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Article
Powder Metallurgy Production of Ti–5.4 wt.% Si Alloy. II. Structure and Strength of the Sintered Material
The powder metallurgy production of porous Ti–5.4 wt.% Si material promising for solid oxide fuel cells is studied. Its structure and mechanical properties are examined. It is shown that compacting pressure in...
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Article
Powder Metallurgy Production of Ti–5.4 wt.% Si Alloy. I. Simulating the Formation of Powder Particles by Centrifugal Atomization
The powder-metallurgy production of porous Ti–5.4 wt.% Si material used in solid oxide fuel cells is examined. The cooling rate of powder particles, as the main factor influencing their structure in the centri...
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Article
Fracture Resistance of Residually-Stressed Ceramic Laminated Structures
We have studied the effect of residual stresses on fracture resistance and crack arrest behavior of asymmetric ceramic laminated Si 3 N 4/Si 3 N 4–TiN structures. Using the compliance method, we assessed the tech...
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Article
Bifurcation of Cracks in Laminated Ceramic Composites with Rigid Interlaminar Bonds
Bifurcation of cracks in symmetrical laminated two-component composites was analyzed. Geometric factors limiting this effect were established. The bifurcation area is shown to be determined by the following pa...
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Article
Statistical Evaluation of Microcracking of Inelastic Ceramics
The model of fracture applicable to multiphase brittle materials, ceramics in particular, is developed. The model was used to solve the physical problem of describing the mechanical behavior of inelastic ceram...
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Article
Principles of the design of highly porous layered composites working in the bending mode
A comparative analysis is made of the spesific mechanical characteristics of a sandwich-type laminated porous composite under bending. The external layers of the composite are compact while the internal layer ...
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Article
Comparative study of the specific stiffness and yield of powder compact and porous materials during bend testing
Comparative analysis of the mechanical behavior of compact and porous beams operating under a bending regime is described. Experimental procedures are suggested for determining the different normalized paramet...
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Article
Influence of random pore-type mesodefects on the strength of brittle materials
The effect of pore-type mesodefects on the mean bending strength of brittle materials is calculated by a statistical method. The combined effect of defect amount in a specimen is analyzed and so is the effect ...
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Article
Limiting state of two-phase composites under uniaxial tension
We propose a model based on the statistical analysis of fracture processes and a concept of effective medium when a system of structural elements of different kinds is regarded as a quasihomogeneous medium wit...
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Article
Potential energy of a body with spheroidal cavity under three-point bending
We analyze the distribution of the density of the potential energy of deformation in a solid body with spheroidal cavity under three-point bending and investigate the possibility of application of the obtained...
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Article
Effect of the structural state on the cold brittleness and fracture toughness of low-alloyed molybdenum
We investigate the effects of the chemical and phase compositions of grain boundaries and the state of an excess phase on the fracture toughness, cold brittleness, and strength of low-alloyed molybdenum by the...
