Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : material

Improving Drilling Fluid Properties by Using Nano-Additives

D. Mahmood; N.S.AL-Zubaidi; A. A. Alwasiti

Engineering and Technology Journal, 2017, Volume 35, Issue 10, Pages 1034-1041

Nanotechnology is one of the most important techniques in recent days. Using Nano-additives to improve drilling fluids properties in order to meet the modern drilling process requirement is still being debated till date. In this study, three Nano-materials (magnesium oxide MgO, titanium dioxide TiO2 and Graphene) were used to improve the rheological and filtration properties as well as Clay Yield. The weight of Nano-materials were (0.02, 0.05, 0.2, 0.5, 0.8) gm. The results showed that the rheological properties were the same with Graphene and TiO2, while MgO gave the best results of rheological and filtration properties and with a higher values of yield point and gel strength. The higher value of Clay Yield obtained by0.2wt % (0.8 gm) of MgO was (173bbl/ton) while TiO2 and Graphene gave the same values (124,126 bbl/ton) respectively.

Ceramic Filled Polymer Matrix Composite Used For Bio-Medical Application

Waleed Asim Hanna; Abbas Khammas Hussei; Hayder Abbas Sallal

Engineering and Technology Journal, 2011, Volume 29, Issue 9, Pages 1765-1773

Synthetic polymers such as polyurethane are used widely in the field of
biomedical applications such as implants or part of implant systems.
This work focuses on the preparation of base polymer matrix composite
materials by (Hand Lay-Up) method ,and studying the effect of selected weight
fractions (3 , 6 , 9 , 12 ,15) % wt of Calcium oxide (CaO) , Calcium carbonate
(CaCO3), Magnesium oxide (MgO) ,and Magnesium carbonate (MgCO3) particles
on some properties of the prepared composite.
Some mechanical tests were used to evaluate the prepared system (Tensile,
Compression, Impact, and Hardness) tests, and a physical test of (Water
absorption %), and all tests were accomplished at room temperature.
maximum results of tensile strength, compression strength, impact energy,
hardness, water absorption were ( (31 MPa),( 51 MPa),( o.265 J), (79.8 Shor (D)),
(0.229 %)) at using ( (9% wt (MgCO3)) , ( 9% wt of (MgCO3)) , ( 9% wt of
(CaCO3)) , ( 15% wt of (MgO)) , ( 15% wt of (MgCO3)) respectively

Preparation and Characterization of Polymer- Ceramic Composite Bio-material

Rabab Asim Abdul-Aziz; Waleed Asim Hanna; Kahtan Khalaf Al-khazraji

Engineering and Technology Journal, 2010, Volume 28, Issue 13, Pages 2497-2515

This work focuses on studying the addition effect of the prepared HA powder as
a filler material before and after the calcination process with different volume
fractions (2.5, 5, 7.5, 10, 12.5, 15) vol% to the unsaturated polyester resin matrix.
Many mechanical and physical tests were used to determine the properties of the
prepared composite material which involved tensile strength, the modulus of
elasticity, the elongation percentage at break, compression strength, compression
modulus, bending strength, impact strength, fracture toughness, hardness and water
absorption percentage. For the prepared HA powder, the Ca/P ratio was increased
after the calcination process from 2.45 to 2.51. X- ray diffraction patterns for the
prepared HA powder before and after the calcination process revealed an increase
in the HA peak intensity after the calcination process. Secondary phases also
appeared after the calcination process like (α- Ca3(PO4)2 ) and (β- Ca2P2O7). For the
prepared composite material with both groups of HA filler particles, the results had
shown that the mechanical properties which included: tensile strength, modulus of
elasticity, compression strength, compression modulus, bending strength, fracture
toughness and hardness have been increased with increasing volume fraction of
HA filler particles and reached their maximum value at (7.5 vol%). Furthermore,
the increasing in volume fraction revealed a decreasing in the evaluated properties.
Both the elongation percentage at the break point and the impact strength
decreased with increasing volume fraction of HA filler particles. The water
absorption percentage as a physical property for the prepared composite material
showed an increase with increasing volume fraction of HA filler particles. The
improvement of unsaturated polyester resin with calcined HA filler particles had
shown greater values for the fore-mentioned properties than the improvement of
unsaturated polyester resin with uncalcined HA filler particles.