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LOW-COST CONSTRUCTION OF A WETTABILITY DEVICE USING THE SESSILE DROP METHOD FOR ANALYSIS OF ALLOYS WITH A MELTING POINT UP TO 400°C;
CLAUDIA ALINE DA SILVA BRABO, ALEXANDRE AUGUSTO BALDEZ GATINHO, N?DIA SILVA COSMO, SUANNY QUEMEL MESQUITA, SANDERSON DIAS MAU?S, MARIA ADRINA PAIX?O DE SOUZA DA SILVA;
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COBENGE23
[95] 04. Metodologias e Avaliação do Ensino-Aprendizagem
[313] 04.Metodologias e avaliação do ensino-aprendizagem
The insertion of new technologies and manufacturing processes inevitably
ensures the diffusion of new materials capable of meeting functional and market
requirements. A significant contribution of this work is the ability to construct low-cost
devices using readily available materials and components, making it feasible even for
laboratories and institutions with limited resources. Additionally, the device is user-friendly
and requires minimal adjustments, facilitating its use by researchers and students.The
developed device utilizes the sessile drop technology, where a drop is deposited on a
surface of interest, and its shape is observed and analyzed. Based on parameters such as
contact angle and drop distribution, information about the wettability of the studied alloy
can be obtained. For testing purposes, three different alloys were chosen. Two of these
alloys are lead-free and were proposed by the NPM Laboratories - UFPA. The first one is a
Sn-Sballoy with a 2% Sb content, and the second one is a Sn-Sb alloy with a 5.5% Sb
content. These alloys were specifically developed for electronic applications that require
lead. The third alloy chosen was a peritectic tin-lead alloy with 37% lead. This alloy is
commercially available and is commonly used in electronic repairs due to its soldering and
brazing properties. This choice of alloys allows for a comparison between the lead-free
alloys proposed by the NPM-UFPA laboratory and commercially available Sn-Pb alloys.
This approach enables a comprehensive analysis of the performance and characteristics of
these alloys in different industrial applications. Furthermore, the comparison of the results
obtained with the low- cost device with those obtained with the more expensive and
sophisticated conventional method showed satisfactory agreement. This indicates that the
proposed device is a valid and economical alternative for the analysis of wettability in lowmelting alloys.
Low-cost device, wettability, brazing welding
