Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : TiO2

Effect of Adding TiO2on Some Mechanical Properties of Galloy

Osamah A. Khadhair; Rana A. Anaee; Kadhum M. Shabeeb

Engineering and Technology Journal, 2021, Volume 39, Issue 5A, Pages 695-702
DOI: 10.30684/etj.v39i5A.1395

Because of importance the Ga alloys in dental applications, many attempts were  done  to  improve  the  properties  of  this  alloy. The  currentwork involves  addition  of  TiO2nanotube  powder  to  Galloy  to  improve  somemechanical  properties.  These  properties  included  hardness,  compression, and creep. The characterization of prepared TiO2/Galloys with five wt% of TiO2(1, 2, 3, 4, and 5 wt%) was done by XRD and SEM/EDS. The results showed  that  the  hardness,  compression, were  increased  with  increasing percentage  of  added  TiO2,  while  creep  decrease.Some phases  such as β-Sn,  Ag2Ga  and  Ag9In4were  contributed  to  improve  the  properties  of  new TiO2/Galloycomposites.

Al2O3-TiO2-PMMA Bio-Composite Coating Via Electrostatic Spray Technique

Rasha A. Issa; Mohanad N. Al-Shroofy; Hanna A. Al-Kaisy

Engineering and Technology Journal, 2021, Volume 39, Issue 3A, Pages 504-511
DOI: 10.30684/etj.v39i3A.1894

This work aims preparation of polymer-based biocomposite coating by electrostatic spray method onto 316L stainless steel substrate, the present work will compare the effects of incorporation of Al2O3 and TiO2 particles at a different percentage of (10,15 and 20 % wt. from Al2O3 and TiO2 with (90,85 and 80% wt. PMMA - based electrostatic deposition coating is studied. The structure and chemical composition of composite coatings were studied by using (SEM) & (EDS) and mechanical properties (Microhardness and adhesion strength) of Al2O3-TiO2-PMMA composite coating. The SEM&EDX result showed that the composite coating to be dense with uniform dispersants and continuous with a well homogenous mixture within coating exhibits a much-increased Microhardness and remarkably improved adhesion strength.

Optical and Thermal Characterizations of PMMA Composites

Raghad S. Al-Khafaji; Kareem A. Jasim; Adil M. Ibraheim

Engineering and Technology Journal, 2019, Volume 37, Issue 2B, Pages 61-66
DOI: 10.30684/etj.37.2B.5

Thick composite films were prepared employing hand – layup method . A definite quantity of PMMA ( 98%wt ) , fixed content ( 2% wt ) of rutile titanium dioxide TiO2 , gamma alumina ( ᵞ- Al2O3 ) and Zirconia powder ( ZrO2 ) , were added to polymer solution gradually and separately. Optical constants were obtained of the prepared samples using spectrometer (UV- VIS). The prepared composite samples were thermally characterized by differential scanning calorimeter ( DSC ). We notice increasing value of glass temperature and differential heat capacity ( ∆Cp ) for composites compared with pure PMMA .