【摘 要】
：
Magnesium powders were mechanically alloyed with SiO2 powder particles having different particle sizes using high-energy ball milling techniques under Ar atmosp
【机 构】
：
Mechanical Engineering Department,Ceramic Engineering Department
论文部分内容阅读
Magnesium powders were mechanically alloyed with SiO2 powder particles having different particle sizes using high-energy ball milling techniques under Ar atmosphere for 1 h. The powders were consolidated with cold pressing under 560 Mpa. They were then sintered at 550℃ for 45 min under Ar atmosphere. The composites obtained on the Mg-SiO2 system were investigated using the Archimedes principle, a differential scanning calorimeter, X-ray diffraction, optic microscopy, and scanning electron microscopy. For the mechanically alloyed powders, the solid-state reaction of the synthesis of Mg2Si and MgO progressed further during sintering of the materials. The results showed that the strengthening mechanisms were dependent on dispersion hardening of fine Mg2Si and MgO particulates dispersed homogeneously in the matrix.
其他文献
18Cr18Mn2Mo0.9N high nitrogen austenitic stainless steel exhibits high strength and good ductility at room temperature. The steel shows typical duc-tile-brittle
e superior to that of the traditional local linear prediction.
一、体育竞争情报的基本功能1.体育竞争情报的危机预警功能应对危机最有效的方式就是“未雨绸缪,防患于未然”。一切祸患在开始发生时都是细微而不宜察觉的,危机预警就是采用
steel whether the inartensite volume fraction is 22% or 50%.
La0.75Sr0.25CryMn1-yO3(LSCM) (y=0.0-0.6) composite oxides were synthesized by a complexing process of combining ethylene diamine tetraacetic acid (EDTA) and cit
eason for this phenomenon was discussed. It was found that the relatively low cut-off potential made the activation of the Li2MnO3 com-ponent in the compound a
characteristics from a two-loop autopilot with PI compensator.Both the two-loop and three-loop topologies can stabilize a static unstable missile.However,the fi
Spinel LiMn2O4 was synthesized by a solid-state method. A 204468-size battery was fabricated and stored at 55℃. The structure and mor-phology of the LiMn2O4 ca
w when the injection pressure, the piston velocity, and the forming temperature are much higher. Therefore it is necessary to determine the appropriate processi
proposed method is able to give a physical explanation of the high-rank LOS MIMO channel matrix characteristics.