Cu content has been successfully optimized in a thixo-cast and directly aged (T5-treatment) Al–7Si–0.5Mg (wt.%) alloy. Even after the 0.5% addition, plate-like Al2Cu (?’) phases, which contribute to high strengths large plasticity, are precipitated. The formation of fraction Cu-containing brittle phases could be suppressed as well. Then, Al–7Si–0.5Mg–0.5Cu alloy exhibits ultimate tensile streng...

The possibility of changing the dendritic microstructure associated with conventional casting processes hypoeutectic Al-Si alloys to non-dendritic by using controlled diffusion solidification process (CDS) has been investigated. successful CDS depends on mixing two precursor heated at a superheat condition near their respective liquidus temperature. Experimental work and simulation Ansys softwa...

The structure of the new ternary eutectic Al-Ca-Cu system considered as a replacement for Al-Ce-Cu widely used additive manufacturing has been studied using experimental techniques. liquidus projection in aluminum corner suggested based on experiential studies microstructure and phase composition model alloys. diagram two quasi-binary sections: (Al)-Al27Ca3Cu7 (Al)-Al8CaCu4 three invariant tran...

Non-conductive film with Zn nano-particles (Zn-NCF) is an effective solution for fine-pitch Cu-pillar/Sn– Ag bump interconnection in terms of manufacturing process and interfacial reliability. In this study, NCFs with Zn nano-particles of different acidity, viscosity, and curing speed were formulated and diffused Zn contents in the Cu pillar/Sn–Ag bumps were measured after 3D TSV chip-stack bon...

A synthetic Cu-Al-SO₄ layered double hydroxide (LDH), analogue to the mineral woodwardite [Cu1-xAlx(SO₄)x/2(OH)₂·nH₂O], with x < 0.5 and n ≤ 3x/2, was synthesised by adding a solution of Cu and Al sulphates to a solution with NaOH. The pH values were kept constant at 8.0 and 10.0 by a continuous addition of NaOH. The material obtained had poor crystallinity, turbostratic structure, and consiste...

Abstract The problems associated with the fabrication of in situ metal matrix composites (MMC) by conventional methods can be avoided using microwave sintering and friction stirring combination. current study investigates mechanical electrical properties pure aluminum (Al-100 wt%) Al-Cu MMC. results showed that excellent ultimate tensile strength, toughness, conductivity acquired simultaneously...

The hydrogen permeance of several 0.1 mm thick Pd–Cu alloy foils (80 wt.% Pd–20 wt.% Cu, 60 wt.% Pd–40 wt.% Cu and 53 wt.% Pd–47 wt.% Cu) was evaluated using transient flux measurements at temperatures ranging from 603 to 1123 K and pressures up to 620 kPa both in the presence and absence of 1000 ppm H2S. Sulfur resistance, as evidenced by no significant change in permeance, was correlated with...

Bagasse as a real biomass was converted to hydrogen rich gas via catalytic supercritical water gasification process. To find the effect of Cu on selectivity of products, Cu promoted Ni-γAl2O3 catalysts were prepared with 1 to 20wt% Ni and 0.5 to 10wt% Cu loadings via impregnation method. Catalysts were characterized by ICP, BET, XRD, H2 chemisorption and TEM technique as well CHNS analysis was ...

The objective of the present work is to study the casting characteristics of various A1-Li alloys, which include fluidity and strengths of the alloys and their interaction with cast molds. Materials investigated are Al-Li-Mg and Al-Li-Cu-Mg alloys with Li content of 2.5 wt%. The results show that sand molds with resin binders are good for A1-Li casting. Ceramic coatings can further reduce the m...