S.M. Arakelyan – Dr. Sc. (Phys.-Math.), Professor, Head of Dep., Vladimir State University named after A.&N. Stoletovs. E-mail: firstname.lastname@example.org
A.F. Galkin – Ph. D. (Phys.-Math.), Professor, Vladimir State University named after A.&N. Stoletovs. E-mail: email@example.com
S.V. Zhirnova – Senior Lecturer, Vladimir State University named after A.&N. Stoletovs. E-mail: firstname.lastname@example.org
A.V. Osipov – Junior Research Scientist, Vladimir State University named after A.&N. Stoletovs. E-mail: email@example.com@mail.ru
The article is devoted to the determination of the brightness temperature melting glass carbon (GC).
1) The interest in GC is due to its wide use in science, technology, medicine thanks to its special properties. The GC – isotropic, gas-tight, solid and durable material which combines the properties of graphite and glass (is capable to withstand fast multiple heat and to cool quickly). GS is used as technological equipment in highly aggressive environs, in the manufacturing of semiconducting materials, pacemakers, because GC has good biological compatibility with living tissues. Recently, the interest in carbon materials has increased in connection with the prospects of using in nanotechnology.
2) The experimental set-up. The target, which was the sample of the GC with a carbon content of 99.9%, was exposed to focused laser radiation. We used pulsed-periodic laser radiation of installation of spot welding CLW 50C (wavelength 1064 nm pulse repetition frequency 50 Hz, pulse duration 1−6 ms, pulse energy of 1.3 J) and continuous radiation of fiber laser LS 02 T (wavelength 1070 nm, the radiation power was changed from 10 to 60 watts).
3) Brightness intensifier copper vapor CVL 10 was possible to obtain optical images of the field of laser exposure to 16000 images per second with an exposure time of up to 20 ns, which allowed to observe the process of melting GC in realime.
4) Measurements of brightness temperature were carried out using micro pyrometer MP 1001 on the wavelength of 0.65 µm. The device allows continuous monitoring of the temperature in diapason no worse than 0,5 K.
The brightness temperature melting GC was measured. The resulting value of brightness temperature melting GC 2505±12 K. To de-termine the true melting point you need to know the degree of blackness of the GC with a melting point. It is a complex separate task, which requires further experiments.
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