Choi, Pyuck-Pa Povstugar, Ivan Ahn, Jae-Pyeong Kostka, Aleksander Raabe, Dierk 2024-01-20T17:03:35Z 2024-01-20T17:03:35Z 2021-09-02 2011-05 0304-3991 https://pubs.kist.re.kr/handle/201004/130398 This study is about the microstructural evolution of TiAlN/CrN multilayers (with a Ti:Al ratio of 0.75:0.25 and average bilayer period of 9 nm) upon thermal treatment. Pulsed laser atom probe analyses were performed in conjunction with transmission electron microscopy and X-ray diffraction. The layers are found to be thermally stable up to 600 degrees C. At 700 degrees C TiAlN layers begin to decompose into Ti- and Al-rich nitride layers in the out-of-plane direction. Further increase in temperature to 1000 degrees C leads to a strong decomposition of the multilayer structure as well as grain coarsening. Layer dissolution and grain coarsening appear to begin at the surface. Domains of AlN and TiCrN larger than 100 nm are found, together with smaller nano-sized AlN precipitates within the TiCrN matrix. Fe and V impurities are detected in the multilayers as well, which diffuse from the steel substrate into the coating along columnar grain boundaries. (C) 2010 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV TIN/CRN SUPERLATTICE COATINGS MECHANICAL-PROPERTIES OXIDATION RESISTANCE HEAT-TREATMENT HARD COATINGS THIN-FILMS GROWTH MICROSTRUCTURE WEAR TEM Thermal stability of TiAlN/CrN multilayer coatings studied by atom probe tomography Article 10.1016/j.ultramic.2010.11.012 1 ULTRAMICROSCOPY, v.111, no.6, pp.518 - 523 ULTRAMICROSCOPY 111 6 518 523 scie scopus 000300460900026 2-s2.0-80052528050 Microscopy Microscopy Article; Proceedings Paper TIN/CRN SUPERLATTICE COATINGS MECHANICAL-PROPERTIES OXIDATION RESISTANCE HEAT-TREATMENT HARD COATINGS THIN-FILMS GROWTH MICROSTRUCTURE WEAR TEM Hardcoatings Multilayers Thermal stability Atom probe tomography