Showing papers in "Materials Letters in 1995"

TL;DR: A method for preparation of new ceramic materials based on Ti3SiC2 by using different HIP-SHS techniques is reported in this paper, where the best results in the form of dense polycrystals have been obtained by hot isostatic pressing of Ti3 SiC2-rich powders prepared by self-propagating high-temperature synthesis (SHS).

TL;DR: In this paper, the authors synthesize solids at pH 3 and 9 by the sol-gel process using titanium alkoxide as reactant and the resultant solids were studied by UV-Vis (diffuse reflectance) spectroscopy.

TL;DR: In this paper, the γ-Al2O3 structure was considered as a hydrogen spinel and the complex Al-O infrared absorption band between 1100 and 350 cm−1 was interpreted under the criteria for the band assignment of the spinels.

TL;DR: FTIR spectroscopic analysis confirmed the formation of a bone-like apatite on the coating surface after 1 week exposure to SBF, indicating that these coatings, similar to pure HA and Bioglass® may form strong bonds with living bone through a carbonated apatites interface.

TL;DR: In this article, two ion sources have been used, one for sputtering a graphite target with 1.2 ǫ Ar + ions and a second one for bombarding the growing film with a 600 eV nitrogen ions beam at a temperature of 400 ÒC. The density of the films measured by X-ray reflectometry is found to be about 3.4 compared with a theoretical value of 3.47.

TL;DR: In this article, the diffuse reflectance infrared Fourier transform (DRIFT) spectra of several alumina powders indicate a mixture of bayerite and gibbsite as well as a dawsonite-like species on the surface.

TL;DR: The first transparent hydroxyapatite ceramics were fabricated by microwave processing as well as by conventional sintering at ambient pressure as discussed by the authors, which was achieved essentially using a fine crystalline hydroxypatite powder synthesized hydrothermally as a starting material.

TL;DR: Si 3 N 4 /SiC composites containing up to 30 vol% SiC were fabricated by hot-pressing the mixtures of submicron-sized α-Si 3 n 4 and β-SiC powders as discussed by the authors.

TL;DR: In this paper, the evolution of reverted austenite in 18Ni(350) maraging steel was examined using transmission electron microscopy, and the types of reverted Austenite observed were determined by the aging temperature and time.

TL;DR: A mixture of crystalline NiO and α-Fe2O3 powders in equimolar ratio was mechanochemically treated in a planetary ball mill up to 50 h of milling as mentioned in this paper.

TL;DR: In this paper, the authors describe cw-CO 2 laser vaporization and gas-phase condensation of nanophase ZnO, Eu 2 O 3 and ZrO 2 (particle diameters range from 5-280 nm, 2-30 nm, and 1-13 nm, respectively).

TL;DR: In this paper, a simple model for the spatial variation of composition of a metal/ceramic functionally graded material is developed, subject to certain constraints, such that the flow of heat through the material is either maximized or minimized.

TL;DR: In this article, high-temperature tensile tests on Ti50Pd50 − xNix (x = 10, 15, 20) alloys were carried out at 293-858 K. They were cold rolled with a 24.2-26.4% reduction in thickness and then heat treated for solution or recovery treatment.

TL;DR: In this paper, ZnO-Al2O3 catalysts were prepared by mechanical mixing and co-precipitation and four thermal products were obtained from each preparation by calcination, in air, at 300, 500, 700 and 1000 °C.

TL;DR: In this article, fine-particle lanthanum aluminate powders are prepared by the self-ignited combustion process of a corresponding nitrate-citrate precursor, and the thermal decomposition characteristics and crystallization behavior of the precursor have been investigated by TGA, DTA and X-ray diffraction.

TL;DR: In this article, rubber-montmorillonite intercalates were prepared by a cation exchange process by the interaction between the Na+ ions of montmorillonites and ammonium cations of amine-terminated butadiene acrylonitrile copolymers.

TL;DR: In this article, a 3.6 at% (1.9 wt%) magnesium in titanium was achieved when both the titanium and magnesium powders were premilled separately and then mechanically alloyed together.

TL;DR: In this article, the existence of extremely good adhesion between a silicon substrate and hard diamond-like films (sp3 bonding 78%) prepared by the pulsed filtered arc discharge method has been pointed out.

TL;DR: In this paper, the phase and microstructure of β-CdSnO3 powders were studied by XRD and TEM, and the conductance-temperature, sensitivitytemperature and sensitivity-gas concentration properties were investigated.

TL;DR: In this paper, a comparison of the characteristics of CeO 2 microcrystallites elaborated from two different solvents: water and ethanol is presented, and the results show that water is more stable than ethanol.

TL;DR: In this paper, the optical band gap of PbO glass was determined from the observed sharp fundamental absorption edge and the Urbach energy ΔE was found to be 16.5 × 10−3 eV, almost equal to the energy of phonons corresponding to the internal vibrations of pbO.

TL;DR: In this paper, a combination method of Ti-H2O2 oxidation-hydrothermal growth was used for the formation of ultrafine powders of different morphologies.

TL;DR: In this paper, the main diffusion path is the lattice and MnS inclusion-matrix interfaces, which is the dominant site for hydrogen transport and trapping in resulfurized steel.

TL;DR: In this article, the phase forming mechanisms in the chemical reaction Si + 2TiH2 + B4C → SiC+ 2TiB2 + 2H2 ↑ have been investigated using the XRD technique.

TL;DR: In this article, a structural model for oxide vacancy ordering is proposed, taking the displacement of nearly all anions from tetrahedral 8c sites to 32f sites along ǫ-111-direction.

TL;DR: In this paper, the polymeric precursor method was used to obtain reactive Zr x Ti 1 − x O 4 (x = 0.65, 0.50 and 0.35) powder.

TL;DR: In this article, a polycrystalline, transparent, smooth, dense and crackfree ZnO thin films have been deposited on fused silica by pulsed laser reactive ablation using a Zn target.

TL;DR: In this paper, the microstructural behavior of glass ceramics in the system (SrO · TiO 2 )-(SiO 2 · B 2 O 3 ) with varying wt% of K 2 O have been investigated.

TL;DR: Chromia microspheres were synthesized by the sol-emulsion-gel method as discussed by the authors, and the solvent extraction technique was followed for the preparation of the sols. Cr 2 O 3 crystallized as single phase in the temperature range 400 to 1300 °C.

TL;DR: In this paper, a new property of metal/ceramic interfaces is introduced, which is the slope parameter of the work of adhesion as defined by the linear dependence of the adhesion of different liquid metals in contact with a ceramic on the electron density of the corresponding metals.