Studying the effect of ZrO2 and Sintering Temperature on the Corrosion Behavior and Biocompatibility of Ti-12Mo Alloy for Dental Applications | Chapter 04 | Recent Trends in Chemical and Material Sciences Vol. 8

 Reinforcing pure titanium with 12 percent molybdenum and various weight percentages of zirconia increased the microstructure, mechanical properties, corrosion behaviour, and biocompatibility. To obtain a homogeneous distribution of Mo and ZrO2 in the titanium matrix, powder metallurgy is used. For the manufacture of composite powders, mechanical milling with a ball mill machine was employed, with a 10:1 ball to powder ratio, 100 rpm for a 24 hour milling time, and alumina ceramic balls of 10 mm diameter in an argon atmosphere. 2 wt ethanol is used as a process control agent. Powders of Ti–12Mo/(x)ZrO2 composites are cold compacted in a die with dimensions of 17 x 12 mm2 by a uniaxial press under 600 MPa. To select the best suitable temperature, the compacted samples are sintered at three different temperatures: 1350C, 1450C, and 1500C for 90 minutes. The microstructure of the manufactured Ti–12Mo/ZrO2 composites, as well as parameters such as density hardness, wear rates, corrosion resistance, and biocompatibility, were investigated. The density of pure Ti was raised by adding 12 wt. percent Mo and increasing the ZrO2 percentage to 5 wt. percent, according to the findings. The eutectoid phase was created by adding 12 wt.% Mo to the titanium matrix to reinforce it. The 5 wt. percent ZrO2 sample had the maximum hardness and the lowest wear rate. In the simulated saliva fluid, the Ti–12Mo/(x)ZrO2 composites demonstrate excellent corrosion resistance (SSF). Both Ti, Mo, and Zr ions produced in SSF from Ti–12Mo/(x)ZrO2 nanocomposites were found to be exceedingly low. The findings showed that Ti–12Mo/5 wt. percent ZrO2 composites have a lot of potential for dental implant applications. The biocompatibility test was estimated for all samples. The data also demonstrated that the 5 wt. percent ZrO2 sample achieves high adherence and proliferation of living cells.

Author(S) Details

Hossam M. Yehia
Department of Production Technology, Faculty of Technology and Education, Helwan University, Cairo, Egypt.

Ahmed El-Tantawy
Department of Production Technology, Faculty of Technology and Education, Helwan University, Cairo, Egypt.

I. M. Ghayad
Central Metallurgical Research and Development Institute (CMRDI), P.O.Box 87, Helwan, Cairo, Egypt.

Amal S. Eldesoky
Department of Biomedical Engineering, Higher Technological Institute, 10th of Ramadan, 228, Egypt.

Omayma El-Kady
Central Metallurgical Research and Development Institute (CMRDI), P.O.Box 87, Helwan, Cairo, Egypt.

View Book:- https://stm.bookpi.org/RTCAMS-V8/article/view/6537

Micro and Nano Fabrication by Powder Metallurgy | Book Publisher International

 Many biological systems and natural phenomena have hierarchically complex structures. These structures give animals like nanoscale viruses, microscale cells, and macroscale tissues a variety of functions. Nature's miniaturisation has inspired engineers and scientists to create at the micro and nanoscale. Nanostructures of various geometries, such as nanopillars, nanowires, and nanodots, have been created for a variety of applications, ranging from bioactivity and antibacterial to data storage. There are two techniques to micro and nano fabrication: one is a procedure for building physical items with dimensions in the nanometer to micrometre range, and the other is processing macro components using micron or nano sized powders/grains. Powder metallurgy is one strategy for achieving both approaches at the same time or separately.

Author(S) Details

Peter Chrysologue Angelo
PSG College of Technology, Coimbatore, India.

B. Ravisankar
National Institute of Technology, Tiruchirappalli, India.

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Copper Cold Gas-Dynamic Spray Processing for Highly Effective Antipathogenic Coatings: An Integrated Microstructural, Mechanics, and Materials Chemistry Perspective | Chapter 5 | Current Perspectives on Chemical Sciences Vol. 9

 The motivation for this endeavour is to gain a better understanding of microstructural characteristics, materials surface and bulk chemistry, as well as properties of cold sprayed traditional copper and nanostructured copper coatings in terms of antipathogenic contact killing and inactivation applications. During this work, the task of high strain rate induced severe plastic deformation states, microstructures, electrochemical behaviours, surface chemistry, and surface roughness for two copper cold spray material consolidations were characterised, which were developed from conventionally gas-atomized copper powder as well as a nano-agglomerated and spray-dried copper feedstock powder. Prior research has shown that the nanostructured Cu coating has a higher antipathogenic efficacy than the traditional Cu coating. As a result, microstructural analysis was carried out to determine discrepancies between the two coatings so that their respective pathogen killing and/or inactivation rates could be deduced and tested. Advanced laser-induced projectile impact testing, X-ray diffraction, scanning electron microscopy, electron backscatter diffraction, scanning transmission microscopy, nanoindentation testing, energy-dispersive X-ray spectroscopy, confocal microscopy, atomic force microscopy, linear polarisation, X-ray photoelectron spectroscopy, electrochemical impedance spectroscopy, and copper ion rheology results.

Author (s) Details

Bryer C. Sousa
Materials Science and Engineering Program, Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, MA, 01609, USA.

Dr. Danielle L. Cote
Materials Science and Engineering Program, Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, MA, 01609, USA.

View Book :- https://stm.bookpi.org/CPCS-V9/issue/view/44