Scientists have developed the most wear-resistant alloys to date based on platinum blends

Abstract Sandia National Laboratories (SNL) has just announced that they have developed the most wear-resistant platinum alloy to date, with 100 times longer durability than high-strength steels, in the same way as diamonds and sapphires in nature. level. Recently published in the "Advanced Materials" period...

Sandia National Laboratories (SNL) has just announced that they have developed the most wear-resistant platinum alloy to date, with 100 times the durability of high-strength steel, at the same level as materials such as diamonds and sapphires in nature. . An article recently published in the journal Advanced Materials describes the findings of the research team. Nic Argibay, co-author and materials scientist, said: "This shows that we can make fundamental changes to certain alloys, allowing it to achieve a significant increase in metal performance on a broad scale."

Although metals are generally considered to be tough, when they are repeatedly rubbed with Other metals (such as engines), they wear, deform, and corrode unless they are considered to incorporate protective properties into the mechanical lubricant.

In electronics, electron migration affects the outer layers of metal contacts, usually gold or other precious metals.

Under long-term 'fatigue' (year after year, day after day extrusion and sliding), the smaller the joint, the less the initial material, the more severe the wear.

Interestingly, Sandia's newly developed platinum coating can run on imaginary tires for a mile, but only loses the thickness of one atomic layer. Argibay said:

Ultra-durable coatings save the electronics industry more than $100 million in material costs each year – making cost-effective electronics of all sizes and cross-industries sustainable and reliable.

From aviation systems to wind turbines; from mobile microelectronics to radar systems.

Sandia engineer Chris Nordquist, who was not involved in the study, said that the exploration of these wear-resistant materials provides a reliability advantage for a range of equipment.

The opportunities for integration and improvement depend on the specific device. But this material will provide another tool to address the current reliability limitations of metal microelectronic components.

A paper, John Curry, Dr. Sandia, pointed out that many traditional alloys have been developed to increase the strength of the material by reducing the particle size.

Even so, many alloys will become thicker or softer under extreme pressures and temperatures, especially when the metal is fatigued.

With our platinum alloys, the mechanical and thermal stability properties are excellent. During the sliding period, we did not see that the microstructure changed too much under long-term, long-period stress.

The appearance of this new alloy is similar to that of ordinary platinum. It is silvery white and slightly heavier than pure gold. Most importantly, it is no harder than other platinum alloys, but it is much better in terms of heat and wear resistance.

During the study, the team used a modern approach based on computational tools. The theory of Argibay and Chandross is derived from a simulation that simulates the large-scale properties of how a single atom affects a material.

This connection is pitiful in a single observation. The good news is that scientific researchers in many fields are using computational tools to eliminate a lot of guesswork in research and development.

Chandross said: "We are delving into the basic atomic mechanics and microstructures and linking all of these things together to understand why we can get better performance, or why we have poor performance, and then design better performance. alloy".

In another paper published by Carbon, the Sandia team described the results of another extraordinary accident.

One day, when they measured the wear of platinum, they accidentally found a black film on top.

At this point they realized that diamond-like carbon is perhaps one of the best man-made paints in the world. It is as smooth as graphite and hard like a diamond.

Diamond-like carbon usually requires special conditions to manufacture. But in this alloy study, it has been naturally synthesized. Curry said:

We believe that the stability and durability of the material comes from the carbon-containing molecules that adhere and degrade from the environment during the sliding process, which eventually forms diamond-like carbon.

In the industry, there are other ways to do this. But they usually need high-temperature plasma vacuum chambers containing carbon, and the cost is obviously very high.

It is reported that this phenomenon can not only be used to improve the already impressive performance of metals, but also to produce simpler and more cost-effective methods for mass production of high quality lubricants.


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