Metallography of Sputter-Deposited SS304+Al Coatings

Abstract

Plasma-enhanced magnetron sputtered coatings of 304 stainless steel (SS304)?Al containing nominally 0, 4, 7, and 10 wt% Al were deposited on SS304 substrates. The sputter-deposited coatings were characterized for their phase formation and grain size using x-ray diffraction, scanning electron microscopy, and transmission electron microscopy techniques. The sputter-deposited SS304 coatings with no Al contained the metastable phases a and r, while all other coatings that contained different levels of Al showed the presence of equilibrium phases, namely a-ferrite and B2. The grain size in the coatings varied from nanocrystalline to micron size and showed an increasing trend with an increase in the Al content. Reasons for the formation of the metastable phases and variation of grain size with the Al content in the coatings are discussed.

Investigation of thermal properties of Al1050/SS304 sandwich composite sheet by using a numerical, analytical and experimental approach

“…The tested specimens exhibit similar patterns that reveal the presence of Aluminium and Stainless steel metal. The sharp diffraction peaks correspond to the crystalline nature of Al1050 and SS304 layer [18][19][20][21][22][23][24] whereas diffused diffraction peaks correspond to the amorphous nature of the Adhesive layer [25]. The XRD test shows a sharp peak at an angle of 38 figure 1.…”

“…The N is the number of reflections observed. The obtained texture coefficient TC(hkl) for the Al1050 sheet and SS304 sheet is 3.81(220) and 1.91 (102) [19][20][21][22][23][24][25]. The strain (ε) in the Al1050 and SS304 sheet utilised for the manufacturing of the Al1050/SS304 sandwich composite is determined by using equation…”

The Effect of Nitrogen Flow Rate on the Loadbearing Capacity from Nano- to Macro-Hardness of Austenitic Stainless Steels Magnetron Sputtering-Coated with Stainless Steel Films

“…Magnetron-sputtering allows the covering of diverse substrate materials with protective superficial layers of different SS specifications [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] . Films with thicknesses in the order of magnitude of 1.0 μm can be obtained straightforwardly on either heated or unheated substrates or as interlayers [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] . Zhang et al 4 reported on the phase stability of SS films as a function of both target chemical composition and external substrate heating.…”