Scientists identify as world’s most heat resistant materials
Posted on:26 Dec 2016 18:01:32
Free Current Affairs to Your Email
26 December 2016 Current Affairs: A team of UK-based researchers have identified Hafnium carbide (HfC) and Tantalum carbide (TaC) as the world’s most heat resistant material. They can withstand record melting point temperatures up to 3958°C (approx 4000°C). New Laser-heating techniques were used to find the temperature at which TaC and HfC melted, both separately and in mixed compositions.
Hafnium carbide (HfC) and Tantalum carbide (TaC) are refractory ceramicse. they are extraordinarily resistant to heat. Researchers found TaC melted at 3,768 degrees Celsius, and HfC melted at 3,958 degrees Celsius.
Besides, the mixed compound (Ta0.8Hf0.20C) exceeded its previous recorded melting point. These materials at present are mainly used in thermal protection systems on high-speed vehicles and as fuel cladding in the super-heated environments of nuclear reactors. This discovery may pave the way for improved heat resistant shielding for the faster-than-ever hypersonic space vehicles. It means that future spacecraft could become more faster than ever.
Currently hypersonic aircraft travelling above Mach 5 (5 times speed of sound) speed creates very high temperatures as friction is involved when travelling this speed limit. This means that these materials will enable spacecraft to withstand the extreme heat generated from leaving and re-entering the atmosphere.
FreshersLive - No.1 Job site in India. Here you can find latest 2018 government as well as private job recruitment notifications for different posts vacancies in India. Get top company jobs for both fresher and experienced. Job Seekers can get useful interview tips, resume services & interview Question and answer. Practice online test free which is helpful for interview preparation. Register with us to get latest employment news/rojgar samachar notifications. Also get latest free govt and other sarkari naukri job alerts daily through E-mail.