Kinetics of the weak surface segregation of Si in an Fe-10at%Si single crystal

1992 ◽  
Vol 276 (1-3) ◽  
pp. L7-L11 ◽  
Author(s):  
J. du Plessis ◽  
P.E. Viljoen
Keyword(s):  
Single Crystal ◽  
Surface Segregation ◽  
Weak Surface ◽  
Kinetics Of

The kinetics of weak surface segregation

1992 ◽  
Vol 260 (1-3) ◽  
pp. 355-360 ◽  
Author(s):  
J. du Plessis ◽  
E. Taglauer
Keyword(s):  
Surface Segregation ◽  
Weak Surface ◽  
Kinetics Of

Study of potential oscillations during reaction of an aluminium single crystal with an aqueous KOH solution

1990 ◽  
Vol 55 (2) ◽  
pp. 345-353 ◽  
Author(s):  
Ivan Halaša ◽  
Milica Miadoková
Keyword(s):  
Aqueous Solutions ◽  
Single Crystal ◽  
Single Crystals ◽  
Periodic Potential ◽  
Optimum Conditions ◽  
Potential Oscillations ◽  
Dilute Aqueous Solutions ◽  
Experimental Findings ◽  
Kinetics Of

The authors investigated periodic potential changes measured on oriented sections of Al single crystals during spontaneous dissolution in dilute aqueous solutions of KOH, with the aim to find optimum conditions for the formation of potential oscillations. It was found that this phenomenon is related with the kinetics of the reaction investigated, whose rate also changed periodically. The mechanism of the oscillations is discussed in view of the experimental findings.

Elastic Modulus of Pb/Sn Solder Joints in Microelectronics

2002 ◽  
Author(s):  
Cemal Basaran ◽  
Jianbin Jiang
Keyword(s):  
Grain Size ◽  
Elastic Modulus ◽  
Single Crystal ◽  
Solder Alloy ◽  
Ultrasonic Testing ◽  
Heterogeneous Materials ◽  
Testing Methods ◽  
Nano Indentation ◽  
Deformation Kinetics ◽  
Kinetics Of

Young’s modulus (E) values published in literature for the eutectic Pb37/Sn63 and near eutectic Pb40/Sn60 solder alloy vary significantly. One reason for this discrepancy is different testing methods for highly rate sensitive heterogeneous materials, like Pb/Sn alloys, yield different results. In this paper, we study different procedures used to obtain the elastic modulus; analytically, by single crystal elasticity and experimentally by ultrasonic testing and Nano indentation. We compare these procedures and propose a procedure for elastic modulus determination. The deformation kinetics of the Pb/Sn solder alloys is discussed at the grain size level.

RBS/Channeling Characterization of Ba Implanted Mg

1992 ◽  
Vol 279 ◽  
Author(s):  
R. C. Da Silva ◽  
Th. Hauser ◽  
A. A. Melo ◽  
J. C. Soares ◽  
M. F. Da Silva ◽  
...  
Keyword(s):  
Melting Point ◽  
Single Crystal ◽  
Room Temperature ◽  
Surface Segregation

ABSTRACTThe behaviour of 300 keV Ba ions implanted at room temperature with doses between 1015 and 1017 cm−2 in Mg single crystal and foils was investigated. The results show that the Ba ions do not occupy substitutions sites in Mg, either after the implantation or the annealing treatments. However, pronounced migration of Ba to the surface is observed above 380 °C. The remaining fraction overlaps with the aa-implanted distribution and forms small precipitates. This behaviour is not correlated with the recovery of the Mg lattice which is already complete at about 250 °C. The surface segregation of Ba delays the evaporation of Mg to temperatures near the melting point.

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