scholarly journals Surdat: Database of physical properties of lead-free solders

2007 ◽  
Vol 43 (2) ◽  
pp. 125-130 ◽  
Author(s):  
Z. Moser ◽  
W. Gasior ◽  
A. Debski ◽  
J. Pstrus
Keyword(s):  
Experimental Data ◽  
Surface Tension ◽  
Physical Properties ◽  
Lead Free ◽  
Experimental Investigations ◽  
Multicomponent Systems ◽  
Electronic Database ◽  
Pressure Method ◽  
Pure Metals ◽  
Lead Free Solders

The results of investigations, carried out since 1998, of surface tension by the maximum bubble pressure method, and of density by the dilatometric method for pure metals, binary and multicomponent systems have been used to create an electronic database SURDAT of materials for lead-free solders. The database enables also to compare the experimental data of surface tension with the values calculated from Butler's relation and with the literature data of other authors. The base was published at the beginning of the year 2007 as a monograph including the installation program and may by obtained free from the website www.imim.pl. The present version of the SURDAT database will be introduced on the website of the National Institute of Standards and Technology (NIST) together with the new version of Lead-Free Solders base elaborated by NIST. The work on the database is continued. The SURDAT database will be supplemented with new data of surface tension and density for systems already available in the base as well as for new systems and it will be extended by including the results of meniscographic investigations. In the paper there has been offered the instruction for preparing the data for the authors of studies who would like to present the results of their experimental investigations in the SURDAT database.

Viscosity and Surface Tension of Liquid Sn-Cu Lead-Free Solders

2009 ◽  
Vol 38 (6) ◽  
pp. 828-833 ◽  
Author(s):  
N. Zhao ◽  
X.M. Pan ◽  
D.Q. Yu ◽  
H.T. Ma ◽  
L. Wang
Keyword(s):  
Surface Tension ◽  
Lead Free ◽  
Lead Free Solders

The Thermodynamic Database for the Development of Modern Lead-Free Solders

2007 ◽  
Vol 263 ◽  
pp. 99-104 ◽  
Author(s):  
A. Kroupa ◽  
J. Vízdal
Keyword(s):  
Thermodynamic Properties ◽  
Thermodynamic Database ◽  
Lead Free ◽  
Multicomponent Systems ◽  
The Creation ◽  
Lead Free Solders

The methods for the modeling of thermodynamic properties of multicomponent systems are described here. The rules for the creation of a consistent database for multicomponent systems are described generally and documented on the Thermodynamic Database for Lead-free Solders developed in the scope of COST 531 Action. The reassessment of the Sb-Sn system is shown as an example, illustrating the application of consistency rules.

scholarly journals Influence of Zinc on the Surface Tension, Density and Molar Volume of (Ag-Sn)eut +Zn Liquid Alloys

2016 ◽  
Vol 61 (1) ◽  
pp. 361-368 ◽  
Author(s):  
W. Gąsior ◽  
J. Pstruś ◽  
Z. Moser
Keyword(s):  
Experimental Data ◽  
Surface Tension ◽  
Molar Volume ◽  
Zinc Concentration ◽  
Straight Line ◽  
Gas Atmosphere ◽  
Zinc Addition ◽  
Protective Gas ◽  
Lead Free Solders ◽  
Butler’S Equation

The dilatometric and maximum bubble pressure methods were applied for the measurements of the density and surface tension of liquid (Ag-Sn)eut+Zn lead-free solders. The experiments were carried out in the temperature range from 515 to 1223 K for the alloys of the zinc concentration equaling 0.01, 0.02, 0.04, 0.05, 0.1 and 0.2 of the mole fraction. It was found that the temperature dependence of both the density and the surface tension could be thought as linear, so they were interpreted by straight line equations. The experimental data of the molar volume of the investigated alloys were described by the polynomial dependent on the composition and temperature.Calculations of the surface tension by Butler’s equation were conducted and confronted with the experimental data. Some significant deviations between the experimental and the calculated surface tension were observed. They reached almost 40 mNm-1. The observed changes of the density and surface tension caused by the zinc addition to the Ag-Sn eutectic were discussed with the consideration of the thermodynamic properties and the influence of a small quantity of impurities in a protective gas atmosphere.

scholarly journals AN EFFECT OF PIB ADDITIVES TO MINERAL OIL RESULTING IN ELIMINATION OF FILM BOILING DURING STEEL PARTS QUENCHING

2016 ◽  
Vol 3 ◽  
pp. 17-24 ◽  
Author(s):  
Nikolai Kobasko ◽  
Anatolii Moskalenko ◽  
Petro Lohvynenko ◽  
Larisa Karsim ◽  
Sergii Riabov
Keyword(s):  
Experimental Data ◽  
Surface Tension ◽  
Physical Properties ◽  
Heat Flux Density ◽  
Heat Treating ◽  
Mineral Oil ◽  
Film Boiling ◽  
Insulating Layer ◽  
Part Distortion ◽  
Initial Heat

To control the process of film boiling during quenching in oils, quench oil makers as a rule manipulate physical properties such as a surface tension and viscosity. However, there is much experimental data showing that special additives can eliminate film boiling in oils without changing their physical properties and which is counterintuitive. Authors explain such phenomenon by showing that the addition of a special additive, for example PIB (polyisobutylene polymer), will create an insulating layer on the surface of steel parts during quenching in oils that will eliminate film boiling without affecting physical properties of the oil. Insulating layer decreases initial heat flux density which becomes less than critical one and of the oil will not begin film boiling during quenching with the PIB additive. Authors believe that such approach will allow engineers to solve effectively the problem of part distortion after quenching. The new oil quenchant containing special additive PIB is patented in Ukraine and is manufactured by Barkor Ltd for needs of the heat treating industry.

scholarly journals Experimental measurements of gravity casting flow

2019 ◽  
Vol 213 ◽  
pp. 02054
Author(s):  
Libor Lobovský ◽  
Tomáš Mandys
Keyword(s):  
Experimental Data ◽  
Surface Tension ◽  
Experimental Investigation ◽  
Physical Properties ◽  
Room Temperature ◽  
Optical Measurement ◽  
Measurement Methods ◽  
Experimental Measurements ◽  
Transparent Material ◽  
Gravity Casting

An experimental investigation of casting processes performed under well controlled laboratory conditions is presented. Casting molds made of transparent material allow for analysis of flow patterns by means of standard optical measurement methods. The tests are carried out for selected highly-viscous Newtonian fluids at room temperature. The physical properties of the test fluids (i.e. viscosity, surface tension and density) are identified. As a result, an extensive set of experimental data is provided.

Lead-free solders: Enthalpies of mixing of liquid Ag–Cu–Ni–Sn alloys

2007 ◽  
Vol 22 (11) ◽  
pp. 3218-3225 ◽  
Author(s):  
U. Saeed ◽  
H. Flandorfer ◽  
H. Ipser
Keyword(s):  
Experimental Data ◽  
Binary Data ◽  
Quaternary System ◽  
Enthalpy Of Mixing ◽  
Integral Enthalpy ◽  
Lead Free ◽  
Enthalpies Of Mixing ◽  
Polynomial Fit ◽  
Calorimetric Technique ◽  
Lead Free Solders

Partial and integral enthalpies of mixing of liquid Ag–Cu–Ni–Sn alloys were determined at 1000 °C by a drop calorimetric technique using a Calvet type microcalorimeter. They were obtained by adding Ni to the ternary Ag–Cu–Sn alloys with different composition. The data were evaluated by means of an extended Redlich–Kister–Muggianu polynomial fit for substitutional solutions. The minimum and maximum in the quaternary system were also calculated. It was found that the maximum integral enthalpy of mixing (13,310 J/mol at 41 at.% Ag) occurs in the binary Ag–Ni system while the minimum integral enthalpy of mixing (−21,390 J/mol at 61 at.% Ni) occurs in the binary Ni–Sn system. Moreover the experimental data were compared to values calculated by different extrapolation models based on binary data.

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