材料期刊网

A MICROMECHANICAL MODEL FOR γ-TiAl BASE PST CRYSTALS

J.L. Su , G.K. Hu

金属学报(英文版)

An analytical micromechanical method is proposed to examine the dependence of plastic deformation on the microstructure for a PST crystal. The sub-domain microstructure of the γ phase and the effect of the α2 phase are taken into account by a proper micromechanical formulation, the dislocation slip ...

关键词: TiAl alloy , null , null

Transient alumina transformation on a sputtered K38G nanocrystalline coating

Surface & Coatings Technology

A K38G superalloy nanocrystalline coating was produced by magnetron sputtering deposition and its transient oxides formation in the early stage of oxidation (from 5 to 1200 min) was characterized by SEM, XRD, TEM and Photo Stimulated Luminescence Spectroscopy (PSLS). D...

关键词: nanocrystalline coating;oxidation;PSLS;TEM;oxidation behavior;high-temperature;alloys;resistance;scale

Hot-corrosion resistance of a sputtered K38G nanocrystalline coating in molten sulfate at 900 degrees C

Oxidation of Metals

The hot-corrosion behavior of a nanocrystalline coating of K38G alloy, prepared by magnetron sputtering and cast K38G in molten 75 wt.% Na2SO4+25 wt.% K2SO4 at 900degreesC was studied. The coating eliminated...

关键词: K38G alloy;sputtering;coating;molten sulfate;corrosion;superalloy;oxidation

The electrochemical corrosion behavior of K38G nanocrystalline thin film in 3.5% NaCl solution

Thin Solid Films

The electrochemical corrosion behavior of a K38G nanocrystalline (NC) thin film fabricated by magnetron sputtering technique has been investigated in comparison with cast K38G alloy in 3.5% NaCl solution. The results indicated that compar...

关键词: Nanocrystalline thin film;Grain size;Pitting corrosion;Stochastic;theory;ni-based superalloy;stochastic-processes;stainless-steel;pit;generation;anodized titanium;temperature;resistance;initiation

热障涂层对K417G合金高温低周疲劳行为的影响

周轶群 , 佟文伟 , 刘芳 , 张开阔

材料工程 doi:10.3969/j.issn.1001-4381.2014.01.004

研究了涂覆热障涂层的K417G合金800℃下由应变控制的高温低周疲劳行为,并对其循环应力-应变数据和应变-疲劳寿命数据进行了分析,给出了涂覆热障涂层K417G合金的高温应变疲劳...

关键词: 热障涂层 , K417G合金 , 弹性损伤 , 低周疲劳行为 , 过渡疲劳寿命

Explanation of the g-factors and hyperfine structure constants of Co2+ in tetragonal K2ZnF4

Zeitschrift Fur Naturforschung Section a-a Journal of Physical Sciences

The formulas of the g-factors g(parallel to), g(perpendicular to) and the hyperfine structure constants A(parallel to), A(perpendicular to) for 3d(7) ions in tetragonal octathedral crystals are established f...

关键词: superposition model;crystals;ions;resonance;fluorides;centers;mn2+;cr3+

Effect of Ce+ ion implantation upon oxidation resistance of superalloy K38G

稀土学报(英文版)

The oxidation behavior (isothermal and cyclic oxidation) of cast superalloy K38G and the effect of Ce+ ion implantation with dose of 1 x 10(17) ions/cm(2) upon its oxidation resistance at 900 and 1000 degrees C in air were investigated. Meanwhile, the influence of Ce+ ...

关键词: high temperature oxidation;oxidation resistance;ion implantation;superalloy K38G;rare earths;grain-boundary segregation;tial-based intermetallics;reactive;elements;cr metal;temperature;yttrium;cr2o3;behavior

添加0.1mass%Y的K38G高温合金1000℃恒温氧化行为

于萍 , 王亚权

腐蚀学报（英文）

研究了添加0.1mass%稀土Y的铸造K38G高温合金在1000℃的恒温氧化行为.结果表明,较之不含Y的合金，含Y铸态K38G合金的氧化速率显著降低； 氧化时形成双层的外氧化膜...

关键词: 高温氧化 , null , null , null

Cyclic oxidation behavior of glass-ceramic composite coatings on superalloy K38G at 1100 degrees C

Thin Solid Films

The SiO(2)-Al(2)O(3)-ZrO(2)-CaO-ZnO glass-ceramic composite coatings (GC), nanocrystalline NiCoCrAlY coating, and their combinations (bi-layer GC/NiCoCrAlY) were prepared on K38G specimens. The thicknesses of the glass-ceramic coatings and the NiCoCrAlY coatings were a...

关键词: Glass-ceramic coating;NiCoCrAlY;Cyclic oxidation;Magnetron sputtering;resistance;microstructure;scales

G/K织物混杂增强复合材料层合板冲击损伤特性研究

黄英 , 刘晓辉 , 李郁忠

宇航材料工艺 doi:10.3969/j.issn.1007-2330.2002.06.007

采用空气炮实验装置、渗透剂增强的X射线照相法和高强光背射法对中心受到横向冲击的G/K织物混杂增强复合材料层合板的冲击损伤情况进行研究,讨论了

关键词: G/K织物混杂 , 复合材料层合板 , 冲击损伤