Study the effect of the chemical heat treatments on mechanical properties steel (40 Cr)
Study the effect of the chemical heat treatments on mechanical properties steel (40 Cr)
Volume 26, Issue 8 , August 2008, Page 324-334

https://doi.org/10.30684/etj.26.8.15

Abstract
  This work deals with improvement of the mechanical properties of low alloy steel (DIN 40Cr) using surface thermochemical heat treatments ,Carbonizing, Nitriding, andCarbonitriding. ...  Read More ...
A Novel Deployable Open Ends Support Reflector
A Novel Deployable Open Ends Support Reflector

Adnan D. Mohammed; Adnan D. Mohammed; Muhsin J. Jweeg

Volume 26, Issue 8 , August 2008, Page 894-906

https://doi.org/10.30684/etj.26.8.1

Abstract
  This paper presents an improved deployable reflector concept for an Earthobservation mission that requires a low-cost L-band Synthetic Aperture Radar(SAR) satellite. The required reflector ...  Read More ...
Application of Artificial Neural Network In Cathodic Protection of Carbon Steel Pipe In Sea Water
Application of Artificial Neural Network In Cathodic Protection of Carbon Steel Pipe In Sea Water

Sami Abulnoun Ajeel; Ghalib A. Ali

Volume 26, Issue 8 , August 2008, Page 907-918

https://doi.org/10.30684/etj.26.8.2

Abstract
  The intelligent techniques are used successfully in a broad band of applicationsone of these applications is the cathodic protection system. Examples of thesetechniques used in cathodic ...  Read More ...
Diffusion of various liquids to tubular shaped fiber reinforced composites
Diffusion of various liquids to tubular shaped fiber reinforced composites

Hussein Ali Hamid AL-Abdly; Najat j. Salah; Adnan A. AbdulRazak; Hassen Sh. Majdi

Volume 26, Issue 8 , August 2008, Page 919-937

https://doi.org/10.30684/etj.26.8.3

Abstract
  In present work tubular –shaped fiber reinforced composites weremanufactured by using two types of resins ( Epoxy and unsaturated polyester) andseparately reinforced with glass, ...  Read More ...
Properties of Inclined Silicon Carbide Thin Films Deposited By Vacuum Thermal Evaporation
Properties of Inclined Silicon Carbide Thin Films Deposited By Vacuum Thermal Evaporation

Khalid Z. Yahiya; Ammar H. Jraiz; Najem Abdu Al-Kazem

Volume 26, Issue 8 , August 2008, Page 938-943

https://doi.org/10.30684/etj.26.8.4

Abstract
  In this work, thermal evaporation system was employed to deposit thin films of SiC onglass substrates in order to determine the parameters of them. Measurements includedtransmission, ...  Read More ...
An Approach For Forming Spur Gear Tooth Profile
An Approach For Forming Spur Gear Tooth Profile

Safaa H. Abdulrahman; Adnan D. Mohammed

Volume 26, Issue 8 , August 2008, Page 944-957

https://doi.org/10.30684/etj.26.8.5

Abstract
  Due to high working speed requirement in industry of rotating components, geardesign development become quite noticeable and rapid in the vicinity of engineeringparameters which become ...  Read More ...
Hydroxyapatite Coating Improved Corrosion Resistance of 316L Stainless Steel Used For Surgical Implants Applications
Hydroxyapatite Coating Improved Corrosion Resistance of 316L Stainless Steel Used For Surgical Implants Applications

sami Abualnoun Ajeel; Nabeel Alawi kadhim

Volume 26, Issue 8 , August 2008, Page 958-970

https://doi.org/10.30684/etj.26.8.6

Abstract
  Incidences of failure of stainless steel implant devices reveal the occurrence ofsignificant localized corroding pitting and crevice corrosion. To reduce corrosion andachieve better ...  Read More ...
Mathematical Modeling of Conversion CO To CO2 in Batch Mode CO2 Laser System
Mathematical Modeling of Conversion CO To CO2 in Batch Mode CO2 Laser System

Adawiya J. Haider; Duha S. Ahmed; Hind J. Jawad

Volume 26, Issue 8 , August 2008, Page 971-975

https://doi.org/10.30684/etj.26.8.7

Abstract
  The oxidation of carbon monoxide CO over supported noble metal catalyst is animportant part of the catalytic control in sealed-off TEA CO2 laser system. In this model,the activities ...  Read More ...
Design of Free – Form Planar Closed Curves Using Four Point Interpolation
Design of Free – Form Planar Closed Curves Using Four Point Interpolation

Wissam K.H; Hussam L. Alwan; Bushra B. Abd Alhassan

Volume 26, Issue 8 , August 2008, Page 976-985

https://doi.org/10.30684/etj.26.8.8

Abstract
  It is desirable to construct a free-form closed curve, since large numbers ofmechanical elements follow these curves. In this work we present a parametricinterpolation for construction ...  Read More ...
Starting Performance Analysis of Single-Phase Capacitor Motor Using Finite Element Method
Starting Performance Analysis of Single-Phase Capacitor Motor Using Finite Element Method

Krikor S. Krikor; Dhari Y. Mahmood; Maha K. Yousif

Volume 26, Issue 8 , August 2008, Page 986-994

https://doi.org/10.30684/etj.26.8.9

Abstract
  This paper presents the starting performance analysis of the single-phase capacitor motorand the effect of motor capacitor on the starting performance. The analysis approach is basedon ...  Read More ...
Electrical Characteristics of Silicon p-n Junction Solar Cells Produced by Plasma-Assisted Matrix Etching Technique
Electrical Characteristics of Silicon p-n Junction Solar Cells Produced by Plasma-Assisted Matrix Etching Technique

Oday A. Hamadi; Ban A.M. Bader; Afnan K. Yousif

Volume 26, Issue 8 , August 2008, Page 995-1001

https://doi.org/10.30684/etj.26.8.10

Abstract
  In this work, plasma-induced matrix etching technique was used to fabricate p-n junctionsolar cells and their electrical characteristics were studied. Results showed reasonableimprovement ...  Read More ...
Dynamically Loaded Analysis of The Adjustable Hydrodynamic Pads Bearing
Dynamically Loaded Analysis of The Adjustable Hydrodynamic Pads Bearing

Muhannad Z. Khelifa; Ali H. Zaibel; Haider Kh.Mehbas

Volume 26, Issue 8 , August 2008, Page 1002-1015

https://doi.org/10.30684/etj.26.8.11

Abstract
  This paper presents the instantaneous journal center velocity under dynamic loadfor adjustable hydrodynamic four pads bearing. The velocity is calculated by mobilitymethod in different ...  Read More ...
Factors Affecting the Relationship Between Total Porosity and Electrical Resistivity for Concrete Repair Materials
Factors Affecting the Relationship Between Total Porosity and Electrical Resistivity for Concrete Repair Materials

Maan Salman Hassan

Volume 26, Issue 8 , August 2008, Page 1016-1024

https://doi.org/10.30684/etj.26.8.12

Abstract
  The paper examines the properties of five different types of repair and substratematerials, including conventional mortar, fly ash mortar, silica fume mortar, conventionalconcrete substrate, ...  Read More ...
Mathematical Model For Estimation of Desublimated Solid Layer Thickness and Surface Temperature
Mathematical Model For Estimation of Desublimated Solid Layer Thickness and Surface Temperature

Wameath Shawki Abdul-Majeed

Volume 26, Issue 8 , August 2008, Page 1025-1035

https://doi.org/10.30684/etj.26.8.13

Abstract
  The thickness of the desublimatd solid layer is an important parameter required forevaluation of such desublimation process, especially in the case of solid layers productionneeded ...  Read More ...
Properties of High Performance Mortar Using Local Additives
Properties of High Performance Mortar Using Local Additives

Husain M.Husain; Zain A. Raouf; Wasan I. Khalil

Volume 26, Issue 8 , August 2008, Page 1036-1054

https://doi.org/10.30684/etj.26.8.14

Abstract
  High performance mortar can be produced by using ultrafine particles and superplasticizeradmixtures which reduce water – cement ratio (less than 0.3). In this investigation an ...  Read More ...