282 Result(s)
within
Characterization and Evaluation of Materials
Yu** Zhou
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Chapter
A Study of Hydroxyapatite Ceramics and its Osteogenesis
A porous hydroxyapatite ceramic block with some tricalcium phosphate was prepared. The in vivo experiments showed that the compression strength of the ceramic block can be reinforced to the level of nature bon...
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Chapter and Conference Paper
Mini-HIP Research in CISRI
The structure and safety of the plug screw-HIP is analyzed in this paper. It is suggested that to use coarse pitch thread, improve the transition region of the vessel and reduce the Rt-value for increasing Kk-val...
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Chapter
A Crack Growth Resistance Model for Fibre-Reinforced Ceramic Materials
The concept of crack–resistance curve is now commonly used to describe the increasing resistance, in terms of either the stress intensity factor KR or the potential energy release rate GR, to crack growth for a w...
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A Study on HA-Coated Titanium Dental Implants Part II Coating Properties in Vivo, Implant Design and Clinical Evaluation
HA coating was obtained by means of plasma spray technique. The properties of HA coating were studied by XRD, IR, SEM and mechanical tests. The coating may be pure HA, pure oxyapatite or a mixture of HA and ox...
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Chapter and Conference Paper
Surface Structure and Chemistry of Cuprate Superconductors
The surface structure of model superconductors La2CuO4, Bi2Sr2CaCu2O8, Tl2Ba2Ca2Cu3O10, (Tl, Pb) Sr2Ca2Cu3O9 and YBa2Cu3O7−∂ has been investigated by high resolution electron microscopy. These crystals are freque...
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Response of Temperature Oscillations in a Tin Melt to Centrifugal Effects
An experimental study was conducted on the flow and temperature oscillations of molten tin in a horizontal boat under centrifugation. A longitudinal temperature gradient was applied to an open boat containing ...
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Chapter and Conference Paper
The Copper Oxides As Guides to New Superconductors
The copper oxides provide not only a remarkably high critical temperature Tc, but also model systems for the study of this new phenomenon. The search for new materials must be guided not only by our understanding...
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Growth of GaAs Single Crystals at High Gravity
Two GaAs single crystals were grown on a centrifuge at 3g, 6g and 9g acceleration. Impurity striations and dislocations were observed for different gravity conditions. Temperature oscillations in molten Sn ind...
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Surface Magnetism of Nanometer Particles
The surface magnetism of nanometer particles between 1 and 100 nm in size is reviewed. Electrical conductors, mainly ferromagnets, and insulators, usually ferrimagnets, are treated separately. Possible relatio...
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Chapter and Conference Paper
Effect of 18 MeV Fe8+ Ion Irradiation on Microstructue of Bi2Sr2CaCu2Ox Single Crystal
Bi2Sr2CaCu2Ox single crystals irradiated with 18 MeV Fe8+ ion at the dose of 1×1012/cm2 were studied by transmission electron microscopy (TEM). Both plan- and cross-sectional observations showed that the defects ...
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Large-Scale Numerical Modeling of Bulk Crystal Growth from the Melt and Solution
Crystal growth is an art which is evolving into a science, and large-scale numerical simulation represents a modern tool for speeding this evolution onward. The use of realistic theoretical models can augment ...
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Experimental Investigation of an Automatic Plugging Meter for Measuring Impurities in Sodium
Plugging meters can be operated manually and automatically. The manual plugging meter was reported before [1]. Many automatic plugging meters have been reported in previous papers [2–6]. In the past few years ...
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Investigation of Thermal Diffusivity of Composite Material by ‘Mirage Effect’
Thermal difrusivity is one of the important physical properties of composite materials, no matter it is used as structural or functional elements. The determination of thermal diffusivity of composite is impor...
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New Absorbing Boundary Conditions for Finite-Difference Modeling of Elastic Waves
The successful development of an effective NDE technique depends on a full understanding of the physics of ultrasound interaction with the test material. This can be best achieved through numerical simulation ...
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A Quantitative Analysis of Cavity Formation in Superplastic Yttria-Stabilized Tetragonal Zirconia
Polycrystalline ceramics have the capability of pulling out in tension to elongations of several hundreds of per cent. However, this deformation generally leads to the development and growth of internal caviti...
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Relations of High-Field Non-Linear Dielectric Properties and Electrorheological Effects
The non-linear dielectric property of the electrorheological (ER) fluids under high AC electric field still lacks detailed investigation compared with other studies on ER fluids. In its physical principle, ER ...
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Chapter
Absorbing Boundary Conditions with Zero Reflection Angles for Compressional and Shear Incident Waves
The technique of artificial absorbing boundaries is often applied in the numerical modelling of wave propagation and other related numerical studies of ultrasonic NDE. For a physical problem with an unbounded ...
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Studies on Foamed Hydrogen Absorbing Electrodes
In the paper, some factors affecting electrode’s hydrogen absorption performances were studied making use of the techniques of galvanostatic cycling, XRD and SEM. Conditions of hydrogen storage alloy manufactu...
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Chapter
Characterization of Creep Fatigue Cracking in Type 304 Stainless Steel
The behaviour of initiation and growth of small cracks in high-temperature push-pull low-cycle fatigue (LCF) was investigated on a Type 304 stainless steel. The characterization of cracking was done both on th...
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Chapter and Conference Paper
Dynamic Fracture Toughness and Crack Propagation in Brittle Material
Experiments of crack propagation in PMMA plates are performed from which the dynamic fracture toughness G c of the material is obtained. The relationship between G ...
