Open Access. Powered by Scholars. Published by Universities.®
- Discipline
Articles 1 - 5 of 5
Full-Text Articles in Engineering
Stress Enhanced Tio2 Nanowire Growth On Ti-6al-4v Particles By Thermal Oxidation
Stress Enhanced Tio2 Nanowire Growth On Ti-6al-4v Particles By Thermal Oxidation
A.S. Md Abdul Haseeb
Titanium dioxide (TiO2) nanowires were grown on Ti - 6wt% Al - 4wt% V (Ti64) particles by thermal oxidation. To investigate the effect of stress on nanowire growth, the particles were milled in a planetary ball mill prior to the thermal oxidation. Thermal oxidation of the Ti64 particles was carried out in a horizontal tube furnace in a controlled oxygen atmosphere in the temperature range of 700-900 °C. The oxygen concentration was varied from 20 ppm to 80 ppm in Ar atmosphere. Nanostructures were characterized by high resolution field emission scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction. TiO2 …
New Generation Of Catalytic Technologies For Environmental Protection On The Base Of Fiber-Glass Catalysts, Bair S. Balzhinimaev, Andrey N. Zagoruiko
New Generation Of Catalytic Technologies For Environmental Protection On The Base Of Fiber-Glass Catalysts, Bair S. Balzhinimaev, Andrey N. Zagoruiko
Andrey N Zagoruiko
Novel glass-fiber based catalysts containing extra-low amounts of noble metals (0.01-0.02% mass of Pt or Pd) demonstrate unique performance in many catalytic reactions, resulted from the ability of the glass fibers to stabilize the transient metals in the glass bulk in a highly-dispersed form. Moreover, specific heat/mass transfer properties, original geometry, high flexibility and high mechanical strength of such catalysts give the way to develop really new catalytic processes and novel reactor designs. The paper is dedicated to the successful research and development (from fundamental research issues to pilot and semi-industrial tests) of different catalytic oxidation processes based on application …
Ethane Oxidation And Pyrolysis From 5 Bar To 1000 Bar: Experiments And Simulation, Abdul Aziz Abdul Raman
Ethane Oxidation And Pyrolysis From 5 Bar To 1000 Bar: Experiments And Simulation, Abdul Aziz Abdul Raman
Abdul Aziz Abdul Raman
An extensive experimental study of ethane oxidation and pyrolysis has been conducted in the high pressure shock tube at UIC covering reflected shock pressures from 5-1000 bar, reaction temperatures up to 1550 K and stoichiometric (Φ = 1 ), fuel rich (Φ = 5), and pyrolytic mixtures. The experimental data has been used to develop a single model that can simulate the whole dataset very well and is the first ethane model capable of simulating experimental results over such an extensive range of pressure, temperature, and stoichiometry. © 2005 Wiley Periodicals, Inc.
On The Physicochemical Problems Of Aqueous Oxidation Of Polymetallic Gold Bearing Sulphide Ore In An Autoclave, Zeljko J. Kamberovic
On The Physicochemical Problems Of Aqueous Oxidation Of Polymetallic Gold Bearing Sulphide Ore In An Autoclave, Zeljko J. Kamberovic
Zeljko J Kamberovic
The paper presents a study on the physical and chemical changes of iron, copper and zinc sulphide minerals in process of pressure oxidation. Oxidation in autoclave is a pre-treatment unit operation for refractory sulphide ores and concentrates in order to valorisat gold, which is encapsuled mainly in pyrite matrix. Raw materials and solid residues are charasterisated. Basing on the results of chemical reactions and on shape of solids residue, we came to a conclusion concerning the mechanism of oxidation in autoclave. The results show that modelling of the process parameters of oxidation in autoclave can be used to predict efficiency …
Response Of Ti-6al-4v And Ti-24al-11nb Alloys To Dry Sliding Wear Against Hardened Steel
Response Of Ti-6al-4v And Ti-24al-11nb Alloys To Dry Sliding Wear Against Hardened Steel
A.S. Md Abdul Haseeb
Titanium alloys have been of great interest in recent years because of their very attractive combination of high strength, low density and corrosion resistance. Application of these alloys in areas where wear resistance is also of importance calls for thorough investigations of their tribological properties. In this work, Ti-6Al-4V and Ti-24Al-11Nb alloys were subjected to dry sliding wear against hardened-steel counter bodies and their tribological response was investigated. A pin-on-disc type apparatus was used with a normal load of 15-45N and sliding speed of 1.88 ms -1. In the steady state, it was demonstrated that Ti-24Al-11Nb had a substantially higher …