Cross-sectional scanning tunneling microscopy ~STM! has been used to characterize compositional structures in InAs0.87Sb0.13 /InAs0.73P0.27 and InAs0.83Sb0.17 /InAs0.60P0.40 strained-layer superlattice structures grown by metal-organic chemical vapor deposition. High-resolution STM images of the ~110! cross section reveal compositional features within both the InAsxSb12x and InAsyP12y alloy lay...

For the first time, this research reports the formation of nanoporous layers of metals on the surface of metal substrates by Raney method and their conversion to corresponding porous perovskite layers. The noble metals doped perovskites are used as catalytic converter for reducing automotive pollutants. The use of perovskite as a substrate for the noble metals can reduce the need for such metal...

fiber metal laminates are hybrid laminates consisting of thin alternating bonded layers of aluminum and fiber/epoxy. arall (aramid aluminum laminate) and galare (glass fiber reinforced aluminum laminate) are specific kinds of fiber metal laminates that consist of thin aluminum sheets along with kevlar/epoxy and glass/epoxy composite layers, respectively. in this study, nonlinear tensile behavio...

J. Przondziono, E. Hadasik, J.Szala, J. Wieczorek, Faculty of Materials Science and Metallurgy, The Silesian University of Technology, Katowice, Poland, W. Walke, Faculty of Biomedical Engineering, The Silesian University of Technology, Gliwice, Poland The purpose of the study was t o evaluate resistance to electrochemical corrosion of magnesium alloy WE43 after plastic working. Potentiodynamic...

The electronic properties of quaternary AlInGaN devices significantly depend on the homogeneity of the alloy. The identification of compositional fluctuations or verification of random-alloy distribution is hence of grave importance. Here, a comprehensive multiprobe study of composition and compositional homogeneity is presented, investigating AlInGaN layers with indium concentrations ranging f...

High-speed commercial aircraft require a surface treatment for titanium (Ti) alloy that is both environmentally safe and durable under the conditions of supersonic flight. A number of pretreatment procedures for Ti alloy requiring multi-stages have been developed to produce a stable surface. Among the stages are, degreasing, mechanical abrasion, chemical etching, and electrochemical anodizing. ...

Surface segregation in alloys can be influenced by the presence of adsorbed species. In this work, the effect of adsorbed sulfur on surface segregation in a Pd70Cu30 alloy was studied for sulfur coverages from zero through saturation and for temperatures from 400 to 1000 K. X-ray photoemission spectroscopy (XPS) was used to determine the alloy composition in the near-surface region ( 7 atomic l...

Titanium (Ti) and its alloys are amongst the most commonly-used biomaterials in orthopedic and dental applications. The Ti-aluminum-vanadium alloy (Ti6Al4V) is widely used as a biomaterial for these applications by virtue of its favorable properties, such as high tensile strength, good biocompatibility and excellent corrosion resistance. TiO₂ nanotube (NTs) layers formed by anodization on Ti6Al...

In our contribution we present the fabrication of Si1−xGex alloy by ion-implantation and millisecond ash lamp annealing. The 100 keV Ge ions at the uence of 10 × 10, 5 × 10, and 3 × 10 cm−2 were implanted into monocrystalline (100)-oriented Si wafers covered by 50 nm thermal oxide. In the consequence, the 50 nm amorphous Ge rich Si layers were obtained. The recrystallization of the implanted la...

Atomic force microscopy was used to study changes in the surface step structure of GaInAsSb layers with varying degrees of phase separation. The layers were grown by organometallic vapor phase epitaxy on (001) GaSb substrates with 2" miscut angles toward (1 1 1)A, (1 1 1)B, and (1 0 1). Alloy decomposition was observed by contrast modulations in plan-view transmission electron microscopy, and b...