Impact of Si and B on the phase stability of cathodic arc evaporated Al0.70Cr0.30-based oxides. (15th July 2018)

• Record Type: Journal Article
• Authors: Koller, C.M.; Dalbauer, V.; Kirnbauer, A.; Sauer, M.; Kolozsvári, S.; Ramm, J.; Mayrhofer, P.H.
• Is Part Of: Scripta materialia. Number 152(2018)
• Page Start: 107
• Page End: 111
• Publication Date: 2018-07-15
• Subjects: Cathodic arc evaporation, (Al, Cr)2O3 -- Thermal stability -- Corundum structure -- Oxides; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.04.018
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Al0.70 Cr0.30 -, Al0.665 Cr0.285 B0.05 -, and Al0.665 Cr0.285 Si0.05 -based cathodic arc evaporated oxides were investigated with respect to their structural evolution during vacuum annealing. Unalloyed (Al0.69 Cr0.31 )2 O3 crystallises with a mixed phase microstructure composed of corundum (α) and metastable cubic and γ-/θ-type phases. Alloying 5 at.% of B or Si to the cathodes results in significant grain refinement of the coatings and the suppression of the α-phase in as-deposited state. In addition, the thermally-induced phase transition from metastable into singe-phased α-structured coatings is effectively shifted from ~900 °C to 950 °C or 1150 °C, respectively. Graphical abstract: Unlabelled Image