Phase composition and structure of multilayered coatings of Ni-Al system

Abstract

Abstract. The nanostructured multilayer coating on the basis of the Ni-Al system is formed by magnetron sputtering. The structural-phase state of the coatings is studied by X-ray analysis. It is established that the coatings with different thickness of nanolayers has NiAl, Al 3 Ni, Ni 2 Al 3 phases and the solid solution of aluminium in nickel. There are different sets of these phases depending on the thickness of layers in the coatings.

Six years’ experience of the XFEL 2K operation

“…Furthermore, precise measurements of flow rate are not necessary and can be replaced using approximative ways. One method is based on the energy balance where the full mixture enthalpy is defined as a sum of full enthalpies of the cold and warm helium flows (𝑚̇cold+𝑚̇warm)•imix= 𝑚̇cold•icold+𝑚̇warm•iwarm (5). The second way is based on the usage of the equation for calculation of Kv value of a valve for critical flow.…”

“…Outlets of all XLVB safety valves protecting the 31mbara systems are collected by a manifold connected to a helium guard representing a buffer kept at a pressure slightly above atmosphere [5]. Another helium guard is installed at the cold compressor box CB44 for capillaries of the pressure measurements in the 31mbara system.…”