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Relationships between the reinforcement properties and the crystallization of MMc
Composite castings Reinforcement phase Crystallization
2011/3/15
Occurrence of a reinforcing phase in a cooling composite casting causes that its crystallization goes differently as compared to the casting without reinforcing (of traditional design). This affects t...
Pressure of gas in gas gap during Lost Foam Process
Foundry engineering Lost foam Foamed polystyrene patterns
2011/3/11
In the study, a model and some fundamental relationships describing changes of gas pressure in the gas gap during manufacture of castings by the Lost Foam process were described. The mathematical desc...
A visualization of the eutectic solidification process
Solidification Visualization Eutectic grain Halo formation
2011/3/11
The study presents a visualization of the sequence of formation of eutectic grains during solidification in volume and directional solidification of model organic materials from the system of salol (f...
Crystallization analysis of AlSi7Mg (AK 7) alloy with use of 'ATND' method
Metallography Creep-resistant austenitic cast steel Additions of Nb and Ti
2011/3/11
In this study, taking as an example the creep-resistant austenitic cast steel, the results of the investigations were presented whose aim was to show what effect the specimen surface condition, discus...
Determination of Reliability Index and Weibull Modulus as a Measure of Hypereutectic Silumins Survival
Casting quality management Reliability Weibull modulus Hypereutectic silumins
2011/3/11
The first part of the study describes the methods used to determine Weibull modulus and the related reliability index of hypereutectic silumins containing about 17% Si, assigned for manufacture of hig...
Identification Trial of Crystallization Parameters of Modified Chromium Cast Iron
Computer-aided foundry process Correction of chemical composition in metal melt
2011/3/11
The article describes a mathematical model of an algorithm used in calculation of the charge burden to correct the misadjusted chemical composition of metal melt. The model assumes that the charge mat...
Solidification of Quasi-Regular Eutectic
The theoretical basics of casting processes Solidification Eutectic Peclet numbe
2011/3/11
The quasi-regular eutectics, one from the groups of the division, accomplished on the basis of the geometry of eutectic phase. The ledeburite eutectic is one from the most commercial eutectics of this...
Influence Cr on Crystallization and the Phase Transformations of the Bronze BA1044
Innovative materials and casting technologies Aluminium bronze
2011/3/11
The investigations were introduced in the paper, method of thermal and derivative analysis (TDA), the process of crystallization and phase transformation in the solid state of the aluminium bronze CuA...
Yb:YAG晶体的合作发光现象
合作发光 Yb:YAG晶体 上转换发光
2010/3/23
研究了Yb：YAG晶体的合作发光现象。当用940nm的近红外光激发时，Yb:YAG晶体有明显的上转换蓝色发光。实验发现498 nm的蓝色发光强度与激发功率的平方成正比，而且Yb3+掺杂浓度越高，蓝色发光越强。分析表明这是Yb3+间强的相互作用导致的合作发光，是由于Yb3+在共价性的YAG基质中，它的4f13电子易于与近邻离子发生相互作用导致的。