Lead halide perovskites have attracted extensive attention in recent years because of their excellent photoelectronic properties, such as high absorption coefficients, carrier mobilities, defect tolerances, and photoluminescence efficiencies. However, a key issue hindering commercial application is the toxicity lead. Replacing lead with other nontoxic elements promising solution to this problem...

Demand for lead-free, free-cutting brass is increasing in response to lead regulations Europe. The authors of this paper have attempted develop a lead-free with an α + β two-phase microstructure, which different from existing C6932 alloy. As result basic investigations, it was found that the addition Si β-brass dramatically reduces cutting resistance due effect appears be reduction stacking def...

Hydraulic components are often subjected to sliding contacts under starved or mixed lubrication. The condition of lubrication occurs during the start-up phase hydraulic machines at low working temperature, causing friction and wear such as cylinder block valve plate. aim this paper was evaluate hydrophobicity oleophilic behavior lead/lead-free bronze coatings different texture conditions obtain...

There has been major interest in Lead-free soldering within the electronics assembly industry for the last several years, and this will continue with the agreement on the language and implementation dates of the WEEE/ROHS legislation in the EU. This paper will focus on several topics critical to the implementation of lead-free soldering. These topics include the impact of Tin-silver-copper as t...