Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Apparent density


Design and Evaluation of Zirconia Based Thermal Barrier Powders for Advanced Engines

M. J. Kadhim; M. H. Hafiz; M. A. Ali Bash

Engineering and Technology Journal, 2017, Volume 35, Issue 10, Pages 1011-1024
DOI: 10.30684/etj.35.10A.8

Advanced utility, diesel and turbines engines used widely in aerospace, chemical and oil industries are based on plasma sprayed thermal barrier coatings. The successful performance of these coatings during servicing are relied mostly on the careful design, selection and analysis of zirconia-based ceramic powders stabilized with yttria and ceria. Different design of sampling techniques relevant for each evaluates property is a key factor to obtain reliable data. Significant property differences were observed for single and mixed powders. In the present work the particle size, its distribution, apparent density, flow rate, biased standard deviation, unbiased standard deviation and phases were characterized using sieving, flowmeter, scanning electron microscopy (SEM), X-ray diffraction (XRD), step scanning X-ray diffraction, energy dispersive spectroscopy (EDS), electron microprobe analysis (EPMA) and FT-IR. Two single alloyed zirconia powders of zirconia- 25 wt% CeO2-2.5 wt% Y2O3 (Sulzer Metco 205NS) and zirconia- 8 wt% Y2O3 (Sulzer Metco 204NS-G) and mixture of these powders 80 wt% (Sulzer Metco 205NS) and 20 wt% (Sulzer Metco 204NS-G) were investigated. The particle shape has a remarkable effect on the flow rate and apparent density rather than the other properties. The particle distribution gives important noticeable information for the plasma spraying coatings.

Effects of New Additives (Lanolin) on the Electro-Deposition of Copper Powder

Sami I. Jafar

Engineering and Technology Journal, 2009, Volume 27, Issue 12, Pages 2308-2321

New organic compound (Lanolin) is added to the electrolyte of copper
powder deposition unit. The influences of the copper concentration, current
density, and specific surface on the apparent density of the produced powder had
been studied. Also the mean grain size of powder, mass of deposited powder are
been calculated. The best concentration of lanolin is 0.7% at which grain size
deposits are smooth and fine (a bout 93% less than 53 micron) and had high
purity of 99.9%.

Effects of New Additives (Lanolin) on The Electro-Deposition of Copper Powder

Sami I. Jafar

Engineering and Technology Journal, 2009, Volume 27, Issue 8, Pages 1659-1672

New organic compound (Lanolin) is added to the electrolyte of copper powder
deposition unit. The influences of the copper concentration, current density, and specific
surface on the apparent density of the produced powder had been studied. Also the mean
grain size of powder, mass of deposited powder are been calculated. The best
concentration of lanolin is 0.7% at which grain size deposits are smooth and fine (a
bout 93% less than 53 micron) and had high purity of 99.9%.