Mechanical properties of Sn–Zn lead-free solder alloys based on the microstructure array

Garcia, Leonardo R.; Osório, Wislei R.; Peixoto, Leandro C.; Garcia, Amauri

doi:10.1016/j.matchar.2009.11.012

Cited by 109 publications

(53 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…HCl y 92% (vol.) etanol [22], a temperatura ambiente, por un período de tiempo de 2 a 5 segundos, dependiendo de la aleación o del metal puro tratado. Previo al ataque químico, las probetas fueron pulidas con alúmina durante 30 y 40 minutos.…”

Section: Preparación De Las Probetasunclassified

Análisis de la resistencia a la corrosión en lluvia ácida simulada de lasaleaciones Zn-Sn

2015

View full text Add to dashboard Cite

RESUMENEl zinc y el estaño, junto con las aleaciones Zn-Sn, son empleados en la industria como recubrimientos del acero frente a la corrosión. Uno de sus usos más frecuentes es el galvanizado para exteriores, el cual es afectado por la corrosión debido a la lluvia ácida.El objetivo del trabajo es evaluar el comportamiento electroquímico que presentan las aleaciones Zn-Sn, con respecto a los metales puros, en una solución acuosa de lluvia ácida simulada compuesta por 31,85 mg/L H 2 SO 4 , 15,75 mg/L HNO 3 , 21,25 mg/L NaNO 3 , 46,20 mg/L (NH 4 ) 2 SO 4 , 31,95 mg/L Na 2 SO 4 , 84,85 mg/L NaCl, con un pH entre 3,5 y 4,0, a temperatura ambiente (25ºC). Para ello, se emplearon probetas de aleaciones con diferentes porcentajes en peso de estaño (6, 10 y 50), y de los metales puros, solidificadas horizontalmente.Se tomaron muestras de cada estructura de grano revelada y se las desbastaron con papeles de SiC, de granulometría entre #60 y #1200. Posteriormente, se realizaron medidas de polarización potenciodinámica en una celda electroquímica convencional de tres electrodos y ensayos de inmersión. Cada probeta se examinó mediante microscopia óptica, antes y después de realizar los ensayos.De las curvas potenciodinámicas se observó para los cortes transversales, que a medida que aumenta el contenido de estaño en la aleación, los potenciales tienden a valores más nobles. A partir de los ensayos de inmersión se denotó que la estructura columnar de zinc y las aleaciones presentan una mayor pérdida de masa que las demás estructuras. Además, el zinc y las aleaciones presentaron la velocidad máxima de corrosión al primer día de inmersión, para todas las estructuras de grano. En las micrografías se evidenció que el zinc presentó corrosión generalizada.Palabras clave: Aleaciones Zn-Sn, Lluvia ácida, Corrosión. ABSTRACTZinc and tin, together with Zn-Sn alloys are used in industrial operations and steel coatings against corrosion. One of its most common uses is the galvanizing process for outdoor structures, which is affected by corrosion caused by acid rain.The aim of the study is to evaluate the electrochemical behavior of Zn-Sn alloys with respect to pure metals, in an aqueous simulated acid rain solution consisting of 31.85 mg/L H 2 SO 4 , 15.75 mg/L HNO 3 , 21.25 mg /L NaNO 3 , 46.20 mg/L (NH 4 ) 2 SO 4 , 31.95 mg/L Na 2 SO 4 , 84.85 mg/L NaCl, at a pH between 3,5 and 4,0, at room temperature (25°C). Zn-Sn alloys samples were used with different percentages of tin (6 wt. % Sn, 10 wt. % Sn and 50 wt. % Sn), and pure metals samples. The samples were obtained by horizontal directional solidification.Samples of each of the revealed structures were taken and roughed with papers of SiC, of grain size between # 60 and # 1200. Subsequently, potentiodynamic polarization essays were performed in a conventional three electrode electrochemical cell and immersion tests. Each ones was examined by optical microscopy, before

show abstract

Section: Preparación De Las Probetasunclassified

Análisis de la resistencia a la corrosión en lluvia ácida simulada de lasaleaciones Zn-Sn

2015

View full text Add to dashboard Cite

show abstract

“…Binary and ternary Sn-Zn-X (where X is alloying element) alloys based in the eutectic Sn-Zn composition (9wt.%Zn) are potential materials to substitute eutectic or near-eutectic Sn-Pb solder compositions [1][2][3][4] . Low melting points, suitable mechanical properties, and relatively low costs characterize the Sn-Zn alloys [5][6][7][8] , when compared with others lead-free solder alloys.…”

Section: Introductionmentioning

confidence: 99%

Correlations of microstructure and mechanical properties of the ternary Sn-9wt%Zn-2wt%Cu solder alloy

Silva

Spinelli

2018

Mat. Res.

View full text Add to dashboard Cite

The microstructure length-scales (dendritic and eutectic), morphologies and tensile properties of a ternary Sn-9wt.%Zn-2wt.%Cu alloy are compared with those of a binary eutectic Sn-9wt.%Zn alloy. The following experimental/analytical steps were performed: transient directional solidification experiments of the Sn-9wt.%Zn-2wt.%Cu alloy; measurements of secondary dendrite arm (λ 2 ) and interphase spacing (λ); morphology of the eutectic α-Zn phase; determination of thermal parameters such as cooling rate (Ṫ L ) and their evolutions during solidification; and, finally, interrelations of microstructure vs. tensile properties. The addition of 2wt.%Cu causes significant refinement of the eutectic structure. Hall-Petch type experimental expressions outlined the variations of strength and ductility with both λ 2 and λ. Very fine Zn globules and needles forming the eutectic in the ternary alloy seems to cause a reversal on ductility behavior, as compared to the tendency observed for the binary Sn-9wt.%Zn alloy. Here, for the ternary Sn-9wt.%Zn-2wt.%Cu alloy ductility increases with decreasing interphase spacing.

show abstract

“…Since traditional soldering alloys contain lead, these materials entail certain risks for human health and environment. For this reason, the number of studies on alternative soldering alloys has been increasing everyday [1][2][3][4][5][6][7][8]. Alternatives to traditional Sn-Pb soldering alloy are expected to pose desired mechanical properties, be easy to procure and have low cost [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

An Investigation of Microstructure and Mechanical Properties of Sn-9Zn-xCr Alloys Produced by Investment Casting Method

Yavuzer

Özyürek

2017

Acta Phys. Pol. A

View full text Add to dashboard Cite

In this study, the microstructure and mechanical properties were investigated of different amount Cr (0.1%, 0.5%, 0.9%) added Sn-9Zn eutectic alloys and Weibull statistical analyses were evaluated using ultimate tensile strength. Pure elements (Sn, Zn, Cr) were used for production of alloys and pre-alloying was done and waited in the electrical resistance furnace at 450 • C for 1 h to homogenized and poured as ingot in plaster moulds. Then pre-alloyed Sn-9Zn-xCr ingots were melted and poured at 300 • C in ceramic moulds prepared investment casting method. As a result of the study, the highest hardness and ultimate tensile strength values were measured in the Sn-9Zn alloy with 0.1% Cr. It was determined that while ultimate tensile strength was decreased, percentage of elongation was increased by increase of Cr amount. According to the Weibull statistical analyses results, the highest Weibull module was calculated by Sn-9Zn-0.1Cr alloy ultimate tensile strength values.

show abstract

Mechanical properties of Sn–Zn lead-free solder alloys based on the microstructure array

Cited by 109 publications

References 26 publications

Análisis de la resistencia a la corrosión en lluvia ácida simulada de lasaleaciones Zn-Sn

Análisis de la resistencia a la corrosión en lluvia ácida simulada de lasaleaciones Zn-Sn

Correlations of microstructure and mechanical properties of the ternary Sn-9wt%Zn-2wt%Cu solder alloy

An Investigation of Microstructure and Mechanical Properties of Sn-9Zn-xCr Alloys Produced by Investment Casting Method

Contact Info

Product

Resources

About