【摘 要】
：
Densification behavior of nanocrystalline Mg2Si (n-Mg2Si) with grain size about 30-50 nm was investigated by hot-pressing at 400℃. The results indicated that t
【机 构】
：
Key Laboratory of Materials Physics
论文部分内容阅读
Densification behavior of nanocrystalline Mg2Si (n-Mg2Si) with grain size about 30-50 nm was investigated by hot-pressing at 400℃. The results indicated that the densification process of n-Mg2Si exhibited three linear segments: p＜0.3 GPa, 0.3 GPa＜p＜1.2 GPa, and p＞l.2 GPa determined by Heckel formula, among which the third fast increasing segment in high pressure range p＞1.2 GPa has seldom been reported in conventional coarse-grained polycrystalline materials. Nevertheless, in the whole pressure range (0.125-1.500 GPa) investigated the densification behavior of n-Mg2Si can be well described by a Kawakita formula p/C=(1/a)p+1/(ab) with constant a=0.452 being in good agreement with the initial porosity of the compact.
其他文献
Thin palladium composite membranes were prepared by modified electroless plating method on α-alumina supports and a dense Pd/α-Al2O3 composite membrane with h
邢台市工业经济联合会秘书长齐振华：我国经济体制由计划经济向市场经济转轨过程中，撤消了企业的主管部门，把本应属于企业自主经营的权力下放给企业，但它所承担的行业管理职能，也随
Model and simulation are good tools for design optimization of fuel cell systems. This paper proposes a new hybrid model of proton exchange membrane fuel cell (
Nd55-xAl10+xCo20Fe15 (x=0, 5, 10) bulk glass-forming alloys with distinct glass transition in differential scanning calorimetry (DSC) traces were obtained by su
介绍了B2C旅游电子商务的概念并分析了其优势，剖析了制约我国B2C旅游电子商务发展的主要因素，提出通过建立准确的定位、选择合适的经营模式、确定企业的盈利模式等促进我国B2C
The principle for the electro-generative leaching was applied to simultaneous leaching of sphalerite-MnO2. A galvanic system for the bio-electro-generative leac
A new polymer named polyferrocarbosilane(PFCS) was prepared from polydimethylsilane and ferrocene. The spinnability of this polymer can be tailored by controlli
Ti2AlC bulk material was synthesized by hot pressing of mixture powders of TiC, Ti, Al and active carbon. The phase compositions of resultant product at differe
Due to the importance of detecting the matte grade in the copper flash smelting process, the mechanism model was established according to the multi-phase and mu
Microstructure of SiC fiber manufactured by chemical vapor deposition (CVD) onto tungsten (W) wire core was investigated by analytical electron microscopy (AEM)