نتایج جستجو برای: initial microstructure

تعداد نتایج: 407443  

تجبر, ناصر, حسینی, سید محمد , صامت, محمد ,

In this research, the decrease of sintering temprature of piezoelectric ceramic PZT, P(Zr0.53Ti0.47)O3 was investigated by adding different percent of NiO impurity to the initial materials and then calcined at 1000ºC. X-ray diffraction results from different samples proved the formation of two phases including tetragonal and rembohedral structure. In addition, formation of a new cubic phase of ...

2015
Omar M. Pecho Andreas Mai Beat Münch Thomas Hocker Robert J. Flatt Lorenz Holzer

3D microstructure-performance relationships in Ni-YSZ anodes for electrolyte-supported cells are investigated in terms of the correlation between the triple phase boundary (TPB) length and polarization resistance (Rpol). Three different Ni-YSZ anodes of varying microstructure are subjected to eight reduction-oxidation (redox) cycles at 950 °C. In general the TPB lengths correlate with anode per...

Journal: :Clinical cases in mineral and bone metabolism : the official journal of the Italian Society of Osteoporosis, Mineral Metabolism, and Skeletal Diseases 2016
Thomas Baum Dimitrios C Karampinos Vanadin Seifert-Klauss Tsvetelina D Pencheva Pia M Jungmann Ernst J Rummeny Dirk Müller Jan S Bauer

PURPOSE Treatment with aromatase inhibitor (AI) is recommended for post-menopausal women with hormone-receptor positive breast cancer. However, AI therapy is known to induce bone loss leading to osteoporosis with an increased risk for fragility fractures. The purpose of this study was to investigate whether changes of magnetic resonance (MR)-based trabecular bone microstructure parameters as ad...

Journal: :Optics express 2002
Brian Washburn Stephen Ralph Robert Windeler

The unique dispersive and nonlinear properties of air-silica microstructure fibers lead to supercontinuum generation at modest pulse energies. We report the results of a comprehensive experimental and numerical study of the initial stages of supercontinuum generation. The influence of initial peak power on the development of a Raman soliton is quantified. The role of dispersion on the spectral ...

2014
Ahmed M. Hussein Satish I. Rao Michael D. Uchic Dennis M. Dimiduk Jaafar A. El-Awady

Three newly identified cross-slip mechanisms from atomistic simulations of fcc crystals, namely surface, bulk and intersection cross-slip types, were hierarchically informed into discrete dislocation dynamics simulations. The influence of each cross-slip type on the evolution of the dislocation microstructure in face-centered cubic microcrystals having different crystal sizes and initial disloc...

2015
Maryam Akhlaghi

The effect of the initial microstructure (recrystallized or cold-rolled) on the nitride-precipitation process upon gaseous nitriding of ternary, ferritic, Fe-Cr-Al alloy was investigated at 450°C. In the recrystallized specimens, precipitation of metastable ternary, cubic, NaCl-type mixed Cr1xAlxN took place, whereas in the cold-rolled specimens precipitation of firstly binary cubic NaCltype Cr...

2008
P. Kathirgamanathan T. Neitzert

This paper investigates a technique to find an optimal set of conditions for an isothermal process to extrude a product for a given shape and material properties with minimal defects. The inputs to this model are: the product geometry and its material data such as flow curve and microstructure during dynamic recrystallization. This is an inverse problem and the model is formulated as a non-line...

Journal: :IJGHPC 2010
Dongliang Zhang

An accurate and reliable computer simulation system can help practical experiments greatly. In a cement hydration simulation system, the basic requirement is to reconstruct the 3-D microstructure of the cement particles in the initial state while mixed with water. A 2-D SEM/X-ray image is certainly achievable; however, it is not easy to obtain parallel images due to the small scale of the cemen...

Journal: :Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada 2013
Jae-Hyung Cho Soo-Hyun Kim Sang-Ho Han Suk-Bong Kang

ZK60 (Mg-Zn-Zr) alloys exhibited a variation in precipitates with aging, and their mechanical properties also changed. Microindentation tests were carried out on two types of ZK60 alloys of solid solution (T4) and peak aging (T6). Microstructure and texture evolution during indentation was investigated using electron backscatter diffraction. Twinning occurred near the indentation marks in most ...

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