(Cr–Al) bi-layer coatings obtained by ion assisted EB PVD on C/C–SiC composites and Ni-based alloys

Measurement and Evaluation of Local Surface Temperature Induced by Irradiation of Nanoscaled or Microscaled Electron Beams

“…When the “free electrons” in metals are given high kinetic energy, e.g., by heating or a high electric field, they can run out of the metal bulk into free space. Electron beam has been used widely in welding [13–16], melting [17], edge cutting-off [18], surface treatment [19, 20], and physical vapor deposition [21]. Nowadays, much recent progress in metal additive manufacturing processes using e-beam melting has been made [22–26].…”

Effect of oxidation on elastic modulus of C/C–SiC composites

“…Microstructural characteristics such as cracking, weight loss and porosity are found to correlate to properties such as tensile strength, flexure strength and elastic modulus [6]. The prospective research has been focused through out the world of qualifying C/C-SiC as a structural material for application at high temperatures [7][8][9].…”

Structure and oxidation behaviors of C/C-SiC coated with Al2O3–CrAl0.42Si1.58–SiC–Al4SiC4oxidation protection system

“…In recent works, coatings with Al 2 O 3 and Cr 2 O 3 had been developed to protect nickel materials, steel, and alloys from high-temperature oxidation and corrosion by employing pulsed laser deposition (PLD), chemical vapor deposition (CVD), plasma spraying technique, and plasma detonation technique [9][10][11][12][13]. As for C/C composites, ion assisted electron beam physical vapor deposition (EB PVD) and pack cementation technique had been used to deposit (Cr-Al) bilayer and Al 2 O 3 -mullite-SiC-Al 4 SiC 4 multicomposition coating [14,15] cementation is a good method to deposit coatings on all the sample surfaces, and it is widely used in producing oxidation protective coating on metal and C/C composites surface [16,17]. However, the reports about using this technique to produce Al 2 O 3 -CrAl 0.42 Si 1.58 -SiCAl 4 SiC 4 coating on the C/C surface have not been seen so far.…”

“…In recent works, coatings with Al 2 O 3 and Cr 2 O 3 had been developed to protect nickel materials, steel, and alloys from high-temperature oxidation and corrosion by employing pulsed laser deposition (PLD), chemical vapor deposition (CVD), plasma spraying technique, and plasma detonation technique [9][10][11][12][13]. As for C/C composites, ion assisted electron beam physical vapor deposition (EB PVD) and pack cementation technique had been used to deposit (Cr-Al) bilayer and Al 2 O 3 -mullite-SiC-Al 4 SiC 4 multicomposition coating [14,15]. Pack…”

“…Mullite ceramic coatings are promising candidate materials for high-temperature applications [15]. So they were the main composites of some antioxidation glass coating to protect C/C composites [18,19], metal, and other materials [8][9][10][11][12][13][14]. Although a few of defects such as cracks or pores may exist in the coating, the coating still can act as the protector of C/C because of the sealing of glass to the defects.…”