Изменение структуры и элементного состава сплавов на основе алюминия при воздействии ускоренных газовых ионов, а также потоков водородной и дейтериевой плазмы
The variation in surface microrelief of the aluminum-lithium alloy Al-2% Li-2.5% Cu and pure aluminum as a result of irradiation by powerful pulsed hydrogen-plasma fluxes at heat-flux densities of 105-5·106 W·cm-2 and pulse length 20 μsec is investigated on a Desna unit. The minimum heat-flux density from the high-temperature plasma required to initiate surface melting of aluminum materials is determined. The temperature and corresponding vaporization rate from the sample surface are estimated for several characteristic heat-flux densities.
The effect of various regimes of plasma irradiation in the "Plasma focus" device on the surface structure of vanadium has been studied. It is established that at the plasma power density values of 108 – 1010 W/cm2 there are pores, microcracks and gas bubbles in the structure of material. In addition, as a result of the plasma action, the ejection of individual pieces of material from the irradiated vanadium surface was observed.