材料期刊网

THE DEVELOPMENT OF RAPIDLY SOLIDIFIED MICROSTRUCTURE IN SiC p/A356 COMPOSITES SUBJECTED TO LASER BEAM

K. Zhang and G.N. Chen Materials Center , Institute of Mechanics , The Chinese Academy of Sciences , Beijing 100080 , China

金属学报(英文版)

The present investigation is aimed to understand the microstructure evolution of SiC p/Al Si composites, i.e. particle distribution and matrix microstructure in laser processing. Microstructures of SiC p/A356 composite and the monolithic alloy are comparatively studied through laser remelting pro...

关键词: composites , null , null

Ion sputter erosion in metallic glass-A response to "Comment on: Homogeneity of Zr(64.13)Cu(15.75)Ni(10.12)Al(10) bulk metallic glass" by L-Y. Chen, Y-W. Zeng, Q-P. Cao, B-J. Park, Y-M. Chen, K. Hono, U. Vainio, Z-L. Zhang, U. Kaiser, X-D. Wang, and J-Z Jiang J. Mater. Res. 24, 3116 (2009)

Journal of Materials Research

The morphology of the dark and bright regions observed by transmission electron microscopy for the Zr(64.13)Cu(15.75)Ni(10.12)Al(10) bulk metallic glass strongly depends on the ion beam parameters used for ion milling. This indicates that the ion beam could introduce surface fluctuation to metallic ...

关键词: room-temperature

Phase segregation and its effect on the adhesion of Cr-Al-N coatings on K38G alloy prepared by magnetron sputtering method

Surface & Coatings Technology

Cr1-xAlxN (0K38G alloy. The composition and microstructure of the coatings were investigated. Phase segregation of cubic AIN was considered in Cr0.65Al0.35

关键词: Cr(1-x)Al(x)n coatings;cubic AlN segregation;residual stress;scratch;test;cathodic arc evaporation;aluminum nitride;hard coatings;high-pressure;thin-films;cubic-aln;mechanical-properties;transition;superlattices;stress

Oxidation resistance of a Cr0.50Al0.50N coating prepared by magnetron sputtering on alloy K38G

Oxidation of Metals

A Cr0.50Al0.50N coating has been prepared by a reactive-magnetron-sputtering method on alloy K38G. The coating possesses mainly the B1 type with a small amount of B4-type crystal structure phase. Isothermal oxidation tests were performed ...

关键词: Cr0.50Al0.50N coating;magnetron sputtering;isothermal oxidation;oxidation mechanism;thermal barrier coatings;cyclic oxidation;high-temperature;bond-coat;microstructural development;isothermal oxidation;diffusion coatings;nitride coatings;hard coatings;behavior

Y4Si2O7N2: A New Oxynitride with Low Thermal Conductivity

Journal of the American Ceramic Society

Search for new thermal barrier materials with high-temperature stability is very difficult because there are intractable choices among thousands of possible candidates. The present paper shows that identifying and developing new low thermal conductivity

关键词: theoretical elastic stiffness;barrier coatings;mechanical-properties;gas;gamma-y2si2o7;crystal;y2sio5;system;phase;si3n4-sio2-y2o3

Theoretical investigations of the defect structure and the g factors of a tetragonal Ni3+ center in PbTiO3

Zeitschrift Fur Naturforschung Section a-a Journal of Physical Sciences

The defect structure and the anisotropic g factors of a tetragonal Ni3+ center in PbTiO3 are theoretically investigated from improved perturbation formulas of the g factors for a 3d(7) ion with low spin S = ...

关键词: defect structures;electron paramagnetic resonance;crystal-fields and;spin Hamiltonian;Ni3+;PbTiO3;electron-paramagnetic-resonance;atomic screening constants;superposition model;epr parameters;lead titanate;scf functions;ions;crystals;cr3+;nanopowders

Theoretical investigations of the local structure and the g factors for the tetragonal Ru3+ center in PbTiO3

Radiation Effects and Defects in Solids

The local structure and the g factors for the tetragonal Ru3+ center in PbTiO3 are theoretically studied from the perturbation formulas of the g factors for a 4d(5) ion in tetragonally distorted octahedra. F...

关键词: defect structures;electron paramagnetic resonance;crystal-fields and;spin Hamiltonian;Ru3+;PbTiO3;electron-paramagnetic-resonance;atomic screening constants;spin-resonance;lead titanate;scf functions;crystals;ions;cr3+;nanopowders;epr

Theoretical investigations of the local structure and the EPR parameters for the trigonal Co2+ center in K4CdCl6

Journal of Magnetism and Magnetic Materials

The local structure and the electron paramagnetic resonance (EPR) g factors g(parallel to), g(perpendicular to) and the hyperfine structure constants A(parallel to) and A (perpendicular to) for the trigonal ...

关键词: defect structure;electron paramagnetic resonance;crystal- and;ligand-field;Co2+;K4CdCl6;atomic screening constants;magnetic-properties;superposition model;rh(iii) compounds;scf functions;sr3mrho6 m;cr3+ ions;crystals;impurities;transition

Investigations of the g factors for the orthorhombic Co2+ center in YBa2Cu2.7Co0.3O7-x at room temperature

Physica C-Superconductivity and Its Applications

The anisotropic g factors g(x), g(y) and g(z) for the orthorhombic Co2+ center on the Cu(l) site in YBa2Cu2.7CO0.3O7-x at room temperature are th...

关键词: electron paramagnetic resonance;crystal fields and spin hamiltonians;Co2+;YBa2Cu2.7Co0.3O7-x;atomic screening constants;d-orbital theory;paramagnetic-resonance;scf functions;spin gap;field;ions;0-less-than-or-equal-to-x-less-than-or-equal-to-0.30;yba2cu3o7-delta;la2-xsrxcuo4

Studies on the local structure and the g factors for the tetragonal Er3+ center in ThO2

Journal of Alloys and Compounds

The local structure and the g factors for the tetragonal Er3+ center in ThO2 are theoretically studied from the perturbation formulas of the g factors for a 4f(11) ion in tetragonal symmetry. This defect

关键词: electron paramagnetic resonance;impurity structure;Er3+;ThO2;electron spin resonance;rare-earth ions;superposition-model;single-crystals;thorium oxide;spectroscopy;parameters;operators;eu3+;site