Effect of mixed rare earth oxides and CaCO3 modification on the microstructure of an in-situ Mg2Si/A

来源 :稀有金属(英文版) | 被引量 : 0次 | 上传用户:ljxue1224
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The effects of mixed rare earth oxides and CaCO3 on the microstructure of an in-situ Mg2Si/Al-Si hypereutectic alloy composite were investigated by optical microscope, scanning electron microscope, and energy dispersive spectrum analysis. The results showed that the morphology of the primary Mg2Si phase particles changed from irregular or crosses to polygonal shape, their sizes decreased from 75 μm to about 25 μm, and the compound of both the oxide and CaCO3 was better than either the single mixed rare earth oxides or CaCO3.
其他文献
2024 aluminum matrix composites reinforced with different size AlN particles (0.5, 4 and 10 μm) were fabricated by the squeeze-casting technology. The aging be
The WC powder was precoated on the surface of CrNiMo stainless steel and then made into an alloying layer by using the laser alloying technique.Phases in the la
The superplastic behavior was studied in an Al-4Cu-1Li-0.4Mg-0.4Ag-0.1Zr alloy. The alloys were manufactured both by a conventional rolling route and a thermo-m
针对目标函数和约束条件均含区间参数的情况,在定义P-可信度指标基础上,给出问题的机会有效解及参数确定型优化命题.由此,决策者可以根据自身偏好和客观情况,通过设定确定型
对直觉模糊关系进行了再研究,提出了直觉模糊关系的核与闭包的概念,得到了直觉模糊关系的十四集定理.首先,利用直觉模糊逆自反关系、对称关系以及自反关系给出了直觉模糊关系
Three dimensional large eddy simulation (LES) is performed in the inves-tigation of stably stratified turbulence with a sharp thermal interface. Main results ar
The load balance is a critical issue of distributed Hash table (DHT), and the previous work shows that there exists O(logn) imbalance of load in Chord. The load