According to foreign media reports, New Mexico State Albuquerque National Laboratory researchers developed a 90% platinum and 10% gold wear-resistant materials, which is currently the most wear-resistant metal alloy, 100 times times more durable than high-strength steel, and natural diamonds and sapphire and other materials in the same level of wear.
The researchers point out that if a car's tyre coating is made from this material, it can grind 500 laps around the earth before it wears to the tread.
Diagram: Sandy National Laboratory material scientist Michael Chandros (Michael chandross) and Nicolas Aguibai (Nicolas argibay) perform computer simulations of the new alloy and wear it with an ultra-high vacuum friction tester. It is reported that the study by the U.S. Department of Energy's National Nuclear Safety Administration to provide $ tens of millions of of funding.
The results of the test were published in the journal Advanced Materials (materials) in June this year, when scientists published their findings to the media last week.
A key theory behind this new platinum alloy comes from research institutes such as MIT and the University of Toronto (University of Toronto) who study the amazing heat resistance of gold.
The researchers theoretically speculate that the toughness of a metal depends on its reaction to the heat, not the hardness. ' Many of the traditional alloys that have been developed tend to increase the strength of the material by reducing the size of the particles, ' a postdoctoral fellow at Sandy's National Laboratory, John Coury John Curry, the first author of the paper, said in a statement. Even so, under extreme pressure and high temperatures, many alloys become thicker or softer, especially in the case of metal fatigue. We have found that the mechanical stress and thermal stability of the platinum alloy we have developed are very good. During the friction, we have not observed that the microstructure of the alloy has changed greatly under the long period stress.
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Illustration: This platinum and gold component alloy (right red area) is nearly as abrasive as the diamond in nature and super hard material such as sapphire. To confirm the heat resistance and abrasion resistance of this alloy, the Sandy Asia National Laboratory team conducted rigorous cyclic annealing tests, a heating process used to change material properties during metallurgical processes. In ultra-high vacuum, the alloy is exposed for a full day at temperatures of 500 °c and then applied to various friction and abrasion tests.
The tiny single particles of the alloy and ' To a large extent we rely on the work of the MIT Chris Shu (Chris shuh) team, ' said Nicolas Aguibai, a material scientist, "says Nicolas Argibay. ' They spent years trying to understand the thermodynamic model of grain change and microstructure stability. In Sandy, we have been doing similar alignment modeling work to understand the material's wear level.
' ' If you understand our development work, you can infer from Chris's thermal stability model that an alloy like this should have very good abrasion resistance.
' ' We chose platinum and gold because we were very concerned about electronic components at Sundia, ' Aguibai said. The alloy can be used for mobile phone plugins, computers, satellite collecting rings, and parts that transmit power on airplanes and spaceships. They are plug-ins that are connected to each other and are subjected to wear and tear, as well as conduction currents.
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