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HomeNewsAsiaNewly 3000°C Ablative Ceramic Coating Successfully Developed - Multi-boron-containing Single-phase Carbide

Newly 3000°C Ablative Ceramic Coating Successfully Developed – Multi-boron-containing Single-phase Carbide

Boron carbide (also known as black diamond) has a molecular form of B4C. It is usually grayish in color and powder. This material is used in body armor, tank armor, and other industrial applications. It ranks as one of three hardest materials known (the other two being cubic boron nutride and diamond). It has an Mohs hardness 9.3.
A large number of tests have led to the development of a new ceramic coating by Huang Boyun, Academician at the National Laboratory of Powder Metallurgy of Central South University. This breakthrough could open the door to hypersonic vehicles.

Professor Xiong Xiang of the Institute of Powder Metallurgy at Central South University stated that hypersonic flying is a speed equal or higher than five times the speed of sound. That is, it travels at least 6,120 kilometers an hour. If the main structural elements of the aircraft are able to withstand extreme air friction and heat impact, the flight time from Beijing to New York will take less than 2 hours. . Central South University’s newly discovered ceramic coatings and composite materials provide greater protection. The world’s first single-phase quaternary, boron-containing, carbide ultra-high temperatures ceramic material has been synthesized. This coating is perfect for “fusion” of carbon-carbon materials. Research into mixed materials in binary compounds systems is the main focus of the new material field. The successful application of these materials to hypersonic applications will benefit greatly from their development.

A novel ceramic coated modified carbon/carbon material made up of single phase carbide with quaternary Born, composed of carbon, titanium, carbon, and other boron elements. The multi-ceramic phase is introduced into the porous carbon/carbon combination by means of an infiltration process. It combines high-temperature adaptability of carbides and the antioxidation properties of Borides to create an ultra-high-temperature ceramic. The composites and coatings are superior in terms of ablation resistance as well as thermal shock resistance. The ceramic oxide is able to withstand high temperatures of 3000°C. Ablation loss rate.

The ultra-high temperature ceramic blends high-temperature adaptability from carbides with anti-oxidation properties. This is what makes them a key component of hypersonic vehicles. Xiong Xiang said that these are the most promising parts.

Nature Communications published research results from the development team on June 15th. First unit to complete the thesis is the State Key Laboratory of Powder Metallurgy of Central South University. Zeng Yi and Professor Xiong Xiang are the first to correspond. Dr. Xiong Xiang is the original author. The University of Manchester (UK) was the first to analyze and characterize the material.

After publication, the article received a lot of attention from academic circles around the world and the media. Within three days, the article had been downloaded over 5,000 times. The same articles were also downloaded between 300 and 900 times. The research was covered by many mainstream media, including the British Daily Mail and The Economist. The United States Yahoo and Public Machinery as well the Russian Satellite News Agency and other authoritative academic institutions. . Nature Newsletter’s reviewer stated, “The research results above will spark academic enthusiasm and interest to apply quaternary material systems in the hypersonic force, as this is a very hopeful material system.”

With the help of the National 863 and 973 Foundations, Professor Chang Xiang (a scholar from Yangtze River), the team has been working with an antioxidation coating for carbon/carbon composites at a moderate-high temperature (1600°C). This was done with support by the National Natural Science Foundation. You should look for an ultra-high temperature ceramic coating that has excellent oxidation resistance. The material system was screened for the following: titanium carbide; strontium carbide; zirconium carbonide; zirconium boride; tantalum carbide. This included dozens of other systems as well as hundreds of high-temperature materials. It took 15 years to achieve the breakthrough in development of ceramic coatings which are resistant to ablation at ultra high temperatures (3000°C).

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