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Statements

Subject Item
n2:RIV%2F68407700%3A21230%2F13%3A00205685%21RIV14-MSM-21230___
rdf:type
skos:Concept n18:Vysledek
dcterms:description
Cr-Nb-Al-N coatings with Al content from 0 to 12 at.% were deposited by d.c. reactive magnetron sputtering. The coatings were annealed in protective atmosphere at 800 and 900 degrees C for 1 h and exposed to air at 800,900 and 1200 degrees C for different times. The chemical composition, structure, microstructure, hardness and adhesive/cohesive strength of the coatings, in as-deposited and annealed conditions, were investigated and the oxidation resistance was evaluated. As expected, the Al content increased gradually in the coating with increasing power density in the Al target; nitrogen was kept approximately constant. All coatings exhibited columnar cross section morphology and fcc NaCl-type B1 phase structure. After thermal annealing, an increase in the grain size and a decrease in the lattice parameter were observed, which led to either a decrease in the hardness or lower adhesion/cohesion strength than the as-deposited coatings. The onset oxidation temperature was approx. 900 degrees C for all coatings. High Al content coatings showed minimum oxidation when exposed to 800 degrees C for 2 h and to 900 degrees C for 0.5 h in air. The Al-free and low Al coatings exhibited lower oxidation resistance; Cr2O3 and CrNbO4 coexisting together although signs of the cubic nitride phase were still detected. The increase of Al was beneficial to the improvement of the thermal stability and oxidation resistance of the Cr-Nb-Al-N coatings. Cr-Nb-Al-N coatings with Al content from 0 to 12 at.% were deposited by d.c. reactive magnetron sputtering. The coatings were annealed in protective atmosphere at 800 and 900 degrees C for 1 h and exposed to air at 800,900 and 1200 degrees C for different times. The chemical composition, structure, microstructure, hardness and adhesive/cohesive strength of the coatings, in as-deposited and annealed conditions, were investigated and the oxidation resistance was evaluated. As expected, the Al content increased gradually in the coating with increasing power density in the Al target; nitrogen was kept approximately constant. All coatings exhibited columnar cross section morphology and fcc NaCl-type B1 phase structure. After thermal annealing, an increase in the grain size and a decrease in the lattice parameter were observed, which led to either a decrease in the hardness or lower adhesion/cohesion strength than the as-deposited coatings. The onset oxidation temperature was approx. 900 degrees C for all coatings. High Al content coatings showed minimum oxidation when exposed to 800 degrees C for 2 h and to 900 degrees C for 0.5 h in air. The Al-free and low Al coatings exhibited lower oxidation resistance; Cr2O3 and CrNbO4 coexisting together although signs of the cubic nitride phase were still detected. The increase of Al was beneficial to the improvement of the thermal stability and oxidation resistance of the Cr-Nb-Al-N coatings.
dcterms:title
High temperature properties of the Cr-Nb-Al-N coatings with increasing Al contents High temperature properties of the Cr-Nb-Al-N coatings with increasing Al contents
skos:prefLabel
High temperature properties of the Cr-Nb-Al-N coatings with increasing Al contents High temperature properties of the Cr-Nb-Al-N coatings with increasing Al contents
skos:notation
RIV/68407700:21230/13:00205685!RIV14-MSM-21230___
n18:predkladatel
n19:orjk%3A21230
n3:aktivita
n7:Z
n3:aktivity
Z(MSM6840770038)
n3:cisloPeriodika
August
n3:dodaniDat
n6:2014
n3:domaciTvurceVysledku
n17:8570256
n3:druhVysledku
n11:J
n3:duvernostUdaju
n10:S
n3:entitaPredkladatele
n9:predkladatel
n3:idSjednocenehoVysledku
77371
n3:idVysledku
RIV/68407700:21230/13:00205685
n3:jazykVysledku
n15:eng
n3:klicovaSlova
Cr-Nb-Al-N coatings; Mechanical properties; Thermal stability; Oxidation resistance; High temperature
n3:klicoveSlovo
n14:Cr-Nb-Al-N%20coatings n14:Mechanical%20properties n14:Thermal%20stability n14:High%20temperature n14:Oxidation%20resistance
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[EB1163BCB104]
n3:nazevZdroje
Surface and Coatings Technology
n3:obor
n12:JI
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
4
n3:rokUplatneniVysledku
n6:2013
n3:svazekPeriodika
228
n3:tvurceVysledku
Polcar, Tomáš Li, W.Z. Cavaleiro, A. Evaristo, M.
n3:wos
000321797100022
n3:zamer
n20:MSM6840770038
s:issn
0257-8972
s:numberOfPages
8
n13:doi
10.1016/j.surfcoat.2013.04.027
n16:organizacniJednotka
21230