Material scientists have found a way to enhance implant protection

November 23rd, 2018
Material scientists have found a way to enhance implant protection
Titanium nickelide products. Credit: Tomsk State University
The TSU materials scientists with the Research and Production Enterprise have developed a reliable system for protecting the surface of titanium nickelide products, in particular, implants. Having studied the mechanisms of corrosion resistance of alloys, scientists first discovered metal-ceramic particles and the oxycarbonitride layer, which provide high chemical compatibility of the surface and protect the material from biological fluids exposure. Now, by adjusting the conditions for creating alloys, materials scientists will be able to change the corrosion resistance of implants.

Today the study of how porous alloys develop their corrosion resistance is the most difficult task on the verge of the capabilities of modern devices.
- For the first time, we at TSU showed the phase composition of a dense, corrosion-resistant surface layer of porous titanium nickelide, which provides reliable protection against the corrosive effects of biological fluids of a living organism,- says Yury Yasenchuk, senior researcher at the TSU Scientific Research Institute . - The protective layer is formed in the process of creating a porous alloy without additional coatings and surface treatments. Our studies allowed us to identify the mechanism of its formation and understand how to improve it.

Scientists note that, depending on the goals, it will be possible to create implants with different levels of biocompatibility. Improving the anti-corrosion properties of titanium nickelide alloys will allow materials scientists, with doctors, to successfully solve the problems of bone plastics in various areas of surgery. Now under the grant of the Russian Science Foundation, scientists are developing methods for the formation of protective coatings on implants obtained by other technological methods.

Porous nickelide titanium with shape memory effect and superelasticity in its biomechanical properties is similar to human bone tissue. Thanks to the spongy morphology, it is used to replace bone defects in various diseases. Biomechanical compatibility allows it to easily integrate into the bones of a living organism and function in it for a long time. The most important aspect of the biocompatibility of implants is the corrosion resistance of their surface. However, the nature of this resistance was not previously explained due to the complexity of direct access to the pore surface of the material.

Provided by Tomsk State University

This Phys.org Science News Wire page contains a press release issued by an organization mentioned above and is provided to you “as is” with little or no review from Phys.Org staff.

More news stories

What rising seas mean for local economies

Impacts from climate change are not always easy to see. But for many local businesses in coastal communities across the United States, the evidence is right outside their doors—or in their parking lots.

Where is the universe hiding its missing mass?

Astronomers have spent decades looking for something that sounds like it would be hard to miss: about a third of the "normal" matter in the Universe. New results from NASA's Chandra X-ray Observatory may have helped them ...

Tiny particles can switch back and forth between phases

Three years ago, when Richard Robinson, associate professor of materials science and engineering, was on sabbatical at Hebrew University in Israel, he asked a graduate student to send him some nanoparticles of a specific ...

The friendly extortioner takes it all

Cooperating with other people makes many things easier. However, competition is also a characteristic aspect of our society. In their struggle for contracts and positions, people have to be more successful than their competitors ...

A river of stars in the solar neighborhood

Astronomy & Astrophysics publishes the work of researchers from the University of Vienna, who have found a river of stars, a stellar stream in astronomical parlance, covering most of the southern sky. The stream is relatively ...