Journal of Materials Synthesis and Processing

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Synthesis and Characterization of a Free-Standing, One-Dimensional, Al-Cu/SiC-Based Functionally Graded Material
Journal of Materials Synthesis and Processing - Tập 10 - Trang 75-81 - 2002
M. Gupta, M. O. Lai, T. S. Srivatsan
In this research paper the synthesis of aluminum-copper/silicon carbide–based (Al-Cu/SiC) functionally gradient material using the innovative technique of gradient slurry disintegration and deposition is presented and discussed. Using the gradient slurry disintegration and deposition technique a gradient of SiC was established using an initial weight percentage of 15%. Results of the synthesis wer...... hiện toàn bộ
Dispersion and Rheological Properties of Alumina/Zirconia Slurries with Methyl Isobutyl Ketone/Ethanol Solvents
Journal of Materials Synthesis and Processing - Tập 10 - Trang 237-244 - 2002
H. C. Park, S. Y. Yoon, Y. B. Lee, B. K. Kim, R. Stevens
The dispersion and rheological behavior of alumina, zirconia, and alumina/zirconia mixed slurries were investigated using various solvent ratios of methyl isobutyl ketone (MIBK)/ethanol (EtOH), by measuring sedimentation bulk density, particle size distribution, and viscosity. Well-dispersed suspensions were obtained in MIBK-rich solvents with additional dispersant and in EtOH-rich without dispers...... hiện toàn bộ
Study of a Pure-Ge/Si Short-Period Superlattice by X-Ray Double Crystal Diffraction
Journal of Materials Synthesis and Processing - Tập 7 - Trang 205-207 - 1999
Zhenguo Ji, Huanming Lu, Shiguo Zhang, Duanlin Que, N. Usami, H. Sunamura, Y. Shiraki
Pure-Ge/Si short-period superlattice (SPS) samples consisting of 1.5-monolayer Ge and a 1.4- to 3.8-nm-thick Si layer grown by gas source molecular beam epitaxy (GS-MBE) were studied by double-crystal x-ray diffraction. For SPS with a Si layer less than 2.4 nm, the satellite peak caused by the SPS structure in the rocking curve is quite broad, and no fine structure is found, indicating that there ...... hiện toàn bộ
Mössbauer Studies in the Mechanochemistry of Spinel Ferrites
Journal of Materials Synthesis and Processing - Tập 8 - Trang 155-166 - 2000
V. Šepelák, K. D. Becker
Mössbauer spectroscopy can provide information on a large variety of mechanochemical processes in solids. In this overview, selected examples are presented of Mössbauer studies of homogeneous and heterogeneous mechanochemical reactions in spinel ferrites. Several interesting features are involved in the work, e.g., mechanically induced cation redistributions, changes of nearest-neighbor configurat...... hiện toàn bộ
Effects of a Rotating Magnetic Field on Gas Transport during Detached Crystal Growth in Space
Journal of Materials Synthesis and Processing - Tập 9 - Trang 73-81 - 2001
John S. Walker, Martin P. Volz, Frank R. Szofran, Shariar Motakef
During the detached Bridgman growth of semiconductor crystals, the melt has a short free surface, which is detached from the ampul wall near the crystal–melt interface, thus eliminating the crystal defects caused by contact with the ampul wall. Recent modeling has indicated that initiation and continuation of detached growth depends on the rate of transport of dissolved gas from the crystal–melt i...... hiện toàn bộ
Mass-Spectrometric Study of the Kinetics of Ionic and Molecular Sublimation of Sodium Chloride Single Crystals
Journal of Materials Synthesis and Processing - Tập 7 - Trang 379-385 - 1999
M. F. Butman, A. A. Smirnov, L. S. Kudin, Z. A. Munir
A mass-spectrometric method is used to study the kinetics of ionic and molecular sublimation of sodium chloride single crystals. The positive ions Na+, Na2 +, and Na2Cl+ were identified in the mass spectrum in the temperature range 820–970 K. Up to 970 K no emission of negative ions was observed. The temperature dependence of thermal ion currents, lnI i − (1/T), exhibits a maximum and a minimum su...... hiện toàn bộ
Preface
Journal of Materials Synthesis and Processing - Tập 6 - Trang 369-369 - 1998
Yasuro Ikuma, Andreas M. Glaeser, Janusz Nowotny, Tadashi Sasamoto
Toward a Quantitative Understanding of the Mechanical Alloying Process
Journal of Materials Synthesis and Processing - Tập 8 - Trang 167-180 - 2000
G. Cocco, F. Delogu, L. Schiffini
The mechanical alloying behavior of transition metal-based mixtures and the amorphization of equilibrium intermetallic compounds by milling were characterized on a quantitative basis as a function of the processing parameters. Different kinetic mechanisms rule the two processes. The former giving rise to a sigmoidal-shaped trend, while the latter is characterized by a continuous, gradual decrease ...... hiện toàn bộ
Thermal Evolution of Solid Products Derived from Germanium-Containing Preceramic Polymer
Journal of Materials Synthesis and Processing - - 2002
N. I. Baklanova, E. I. Belyaeva, T. M. Zima
The products formed during thermolysis of poly(germasilethyne) have been studied within temperature range 20–1600°C by means of Raman spectroscopy, XRD and EDS analysis, and SEM analysis. The evolution of solid products derived from poly(germasilethyne) as a function of heat-treatment temperature passes through several stages. At earlier stages the cross-linking of polymer molecules and the format...... hiện toàn bộ
Sintering Behavior of Hot-Pressed Ca–αSialon Ceramics
Journal of Materials Synthesis and Processing - Tập 7 - Trang 35-39 - 1999
Zhou Yanping, Zhuang Hanrui, Wen Shulin
On the basis of phase relationships in the Ca–Si–Al–O–N system, a Ca–α–sialon ceramic was synthesized using the hot-pressing technique. The reaction sequences and densifications of the Ca–α–sialon vs. firing temperatures have been characterized in detail. The present experiments reveal a reaction sequence as follows: at 1250°C the reactant mixture started to soften, at 1300°C a gehlenite phase was...... hiện toàn bộ
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