Crystallization kinetics of Ni-P glass — activation energies for nucleation and growth of nucleiJournal of Materials Science - Tập 23 - Trang 3001-3005 - 1988
K. Lu, J. T. Wang
A pre-anneal treatment was introduced to a melt-spun Ni-P alloy. By crystallizing the asquenched and pre-annealed samples in a differential scanning calorimeter at different heating rates and isothermal process, the apparent activation energies for the total crystallization of the Ni-P samples were obtained by using the Kissinger technique and the Arrhenius relation. It was found that the apparent...... hiện toàn bộ
Characterization of clay composite ballistic witness materialsJournal of Materials Science - Tập 50 - Trang 7048-7057 - 2015
Jonathan E. Seppala, Yoonae Heo, Paul E. Stutzman, John R. Sieber, Chad R. Snyder, Kirk D. Rice, Gale A. Holmes
Mechanical and thermal properties of Roma Plastilina Clay #1 (RP1) were studied through small-amplitude oscillatory shear (SAOS), large-amplitude oscillatory shear (LAOS), and differential scanning calorimetry (DSC), supplemented with thermogravimetric analysis, X-ray diffraction, and X-ray florescence. Rheological characterizations of RP1 through SAOS indicate that the clay composite softens as i...... hiện toàn bộ
Fabrication and characterization of anisotropic dielectrics for low-loss microwave applicationsJournal of Materials Science - Tập 43 - Trang 1505-1509 - 2008
Lanlin Zhang, Gokhan Mumcu, Salih Yarga, Kubilay Sertel, John L. Volakis, Henk Verweij
New magneto-photonic assembly designs for high-gain antennas require dielectrics with a significant anisotropy and low loss at GHz frequencies. This paper describes an approach to fabricate such dielectrics from ceramic laminates. These laminates consist of two ceramics with largely different permittivities and low dielectric losses. Alternating layers of commercially available α-Al2O3 and Nd-dope...... hiện toàn bộ
Sintering and properties of highly donor-doped barium titanate ceramicsJournal of Materials Science - Tập 35 - Trang 895-901 - 2000
S. Urek, M. Drofenik, D. Makovec
The electrical properties of donor (La3+) doped BaTiO3 samples with a donor concentration in the range from 0.3 to 1.5 mol.% of La were studied. Samples were sintered at a low partial pressure of oxygen in order to facilitate anomalous grain growth and donor incorporation. In order to optimise the PTCR anomaly, the samples were annealed in air at 1100°C. Results show that with the use of a specifi...... hiện toàn bộ
Effect of double aluminium doping on the structure, stability and electronic properties of small gold clustersJournal of Materials Science - Tập 50 - Trang 4586-4599 - 2015
Debajyoti Bhattacharjee, Bhupesh Kr. Mishra, Ramesh Ch. Deka
In this work, we have used density functional theory with PW91PW91 functional to analyse the structures, relative stabilities and electronic properties of small bimetallic neutral and charged Au
n
Al2 (n = 1–5) clusters. The results reveal that doping with two Al atoms can significantly affects the geometries of the ground-state Au
n+2 (n = 1–5) ...... hiện toàn bộ