Luminescence properties and tunable emission of Ca3MgSi2O8:Eu3+, Bi3+ phosphor with Bi3+ → Eu3+ energy transfer

Journal of Materials Science: Materials in Electronics - In this work, Ca3MgSi2O8:Bi3+, Ca3MgSi2O8:xEu3+ (x?=?0, 2, 4, 6, 8, and 10 mol%), and Ca3MgSi2O8:6%Eu3+, yBi3+...     

Characterization of Erbium,Indium, and Erbium–Indium co-doped 8%mol Yttria-stabilized Zirconia

Journal of Materials Science: Materials in Electronics - In this work, the cubic structure of Yttria-stabilized Zirconia (8YSZ) and Indium and Erbium co-doped 8YSZ nanopowders have been prepared by...     

Synthesis of MOF derivatives@3D graphene hybrid materials towards high-performance electrode material for supercapacitors

Journal of Materials Science: Materials in Electronics - In this paper, MOF derivatives@3D graphene hybrid materials have been prepared by the electrostatic adsorption of GO and ZIF-8 together with...     

Shape of the fatigue crack front

Institute of the Strength of Materials, Academy of Sciences of the Ukranian SSR, Kiev. Translated from Problemy Prochnosti, No. 8, pp. 19–23, August, 1989.     

Preparation of Diamond in the Graphite–M (M = Sn,Pb) Binary Systems: Synthesis and Structural Defects

Inorganic Materials - Diamond has been synthesized in the graphite–Sn and graphite–Pb systems at pressures from 8 to 9 GPa and temperatures above 1500 and 2000°C, respectively. The...     

High performing Zn-embedded Ni9S8 nanosphere electrodes for Pseudo-supercapacitors

Journal of Materials Science: Materials in Electronics - Highly electroactive Zn-embedded Ni9S8 nanosphere and its ZnS/NixS6-based nanocomposites were prepared by a simple hydrothermal route. The...     

Complex (Mg1/3Ta2/3)4+ ionic substitution on the phase structure and microwave dielectric properties of wolframite MgZr1−x(Mg1/3Ta2/3)xNb2O8 (0 ≤ x ≤ 0.08) ceramics

Journal of Materials Science: Materials in Electronics - In this study, single-phase MgZr1?x(Mg1/3Ta2/3)xNb2O8 (0?≤?x?≤?0.08) ceramics with monoclinic...     

Crystal growth,vibrational assignments,Z-scan studies and quantum chemical investigation on 2-methylimidazolium hydrogen d-tartrate (2MIMDT) single crystal: a promising candidate for NLO applications

Journal of Materials Science: Materials in Electronics - Good quality single crystal, 2-Methylimidazolium d-tartrate (2MIMDT) (C8N2O6H12) was grown by slow evaporation solution growth method. The...     

Materials research at The University of Birmingham

Abstract

The lecture on which this paper is based was presented at the Birmingham meeting on 8 December 1989 to mark the year of Sir Alan Cottrell's 70th birthday. The paper aims to relate the early foundations laid in part by Sir Alan to the recent award to The University of Birmingham of the Interdisciplinary Research Centre (IRC) in Materials for High Performance Applications. The significance of one of Sir Alan's main interests, the application of dislocation concepts to important materials, is illustrated by examining some recent work on melt spun Al alloys and on Ti based metal matrix composites. This work has been carried out in the School of Metallurgy and Materials at Birmingham and is illustrative of much of the current microstructural work in the School.

MST/1313     

Columbia tragedy: High-temperature materials chemistry and thermodynamic considerations of the breached wing leading edge

Metallurgical analysis of debris from the leading edge of the breached left wing of the Columbia space shuttle demonstrated that the temperatures inside the leading edge structural subsystem exceeded 1760 °C (3200 °F). A thin, relatively uniform deposit containing aluminum, Inconel, and Cerachrome was found inside most of the reinforced carbon-carbon composite panels. Such deposition indicates the melting and concurrent deposition of spar, attachment hardware, and insulation. In contrast, panel 8 showed thick, nonuniform deposits suggesting this panel was the breach location. The characteristics of these nonuniform deposits provided indications of plasma flow direction and plasma impingement locations and were helpful in establishing the sequence of failure events. In addition, no indications of A286 were found in the deposits inside panel 8. The lack of evidence for A286 suggests that the breach location was remote from the A286 fittings. This article is based on a presentation given on October 19, 2004, at the session on “The Space Shuttle Columbia: A Forensic Materials Perspective” as part of the Failure Analysis and Prevention Symposium at ASM International’s Materials Solutions Conference and Exposition in Columbus, Ohio.     

Electron paramagnetic resonance: recent developments and trends

Major recent advances:High-field multi-frequency EPR improves our knowledge of magnetic materials, conductive polymers, and spin systems with large zero-field splittings. High-field electron nuclear double resonance provides better access to subtle details of the electronic structure of materials. Materials structure on length scales between 1.5 and 8 nm can now be characterized more precisely.     

Influence of Chloride-Containing Media on the Pitting Resistance of AISI 321 Steel

Materials Science - We develop mathematical models used to describe the dependences of the critical pitting temperatures of AISI 321 steel in model circulating waters with pH 4–8 and a...     

Role of the Diffusion of Products of Redox Reactions in the Processes of Corrosion of Amorphous Aluminum Alloys

Materials Science - By the method of cyclic voltammetry, we study the corrosion resistance of amorphous and crystalline Al87Ni8Y5 alloys in a 0.5 M aqueous NaCl solution for different sweep rates...     

Influence of the Energy of Welding on the Strength of Joints of S960QC High-Strength Steel

Materials Science - We study welded joints (WJ) of plates 6–8 mm in thickness obtained by the electric-arc and laser methods with various values of the energy of welding Ω. The strains...     

Influence of the Structure of Carbon Steels on the Corrosion,Hydrogenation, and Corrosion Cracking in Hydrogen-Sulfide Media

Materials Science - We study the influence of the structure of carbon steels on corrosion, hydrogenation, and corrosion cracking in NACE solution. The corrosion and hydrogenation rates of U8 steel...     

Effect of Complex Magnetic-Abrasive and Chemical-Thermal Treatment on the Fatigue Resistance of VT8 Alloy Compressor Blades

Strength of Materials - The results of studies of the effect of complex magnetic-abrasive (MAT) and chemical-thermal (CTT) treatment on the fatigue resistance of compressor blades made of VT8 alloy...     

Negative thermal expansion materials

Materials exhibiting negative thermal expansion through room temperature have a variety of applications, mainly in controlling the overall thermal expansion of various composites. Several materials showing negative thermal expansion have recently been identified. The most dramatic of such behavior is exhibited by ZrW₂O₈, which shows strong isotropic thermal expansion from 20 to 425K.     

Deposition of Gold Nanoparticles on Silicon in the Pulse Mode of Electrolysis in a DMSO Solution

Materials Science - We study the deposition of gold nanoparticles (AuNPs) on a surface of silicon in the pulse mode of electrolysis in dimethyl sulfoxide solutions of 2–8 mM HAuCl4 under the...     

Deposition of Coatings Based on Boron Carbide by the Gas-Phase Method

Materials Science - We present the results of investigation of the production of boron carbide by the method of hydrogen reduction of boron trichloride BCl3 in a vapor of toluene C7H8. The...     

A novel approach to obtain low-dielectric materials: changing curing mechanism of bismaleimide–triazine resin with ZIF-8

Journal of Materials Science - A zinc-based metal organic framework containing imidazole (ZIF-8) was prepared by the reflux method and blended with bismaleimide–triazine resin (BT resin) to...