Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Bio


Investigation of dual phase (β+γ) CoNiAl MSMA Micro structure effect on the Mechanical Properties and Bio-Corrosion Resistance

J. A. Al-Hahidary; Sehama E. Salih; P.Mukhopadyiay; M. N. Arbilei

Engineering and Technology Journal, 2016, Volume 34, Issue 9, Pages 1888-1893

In this study five compositions of CoNiAl alloy with fixed Al content were prepaid to investigate the effect of chemical composition on the microstructure and phase volume fractions. It was found that by increasing Co the volume fraction of β phase increases and by increasing the β phase the grain size will be increased. This increase will be reflected on increasing the hardness of this alloy. Further investigations for the corrosion resistance in simulated body environment were done. It was found that phase volume fractions increased corrosion rate by increasing the volume fraction of β phase.

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.