Hardness and Nitrogen Bonding Structure of AlxTi1-xN/CrN Multilayer Hard Coating

Title
Hardness and Nitrogen Bonding Structure of AlxTi1-xN/CrN Multilayer Hard Coating
Authors
서종현윤상원채근화박종극송종한Vickram Jayaram이건배성태연권훈안재평
Keywords
AlN/CrN; Multilayer Hard Coating; Crack Propagation; Broken Nitrogen Bond; AlTiN/CrN
Issue Date
2012-02
Publisher
Journal of nanoscience and nanotechnology
Citation
VOL 12, NO 2, 1581-1584
Abstract
AlxTi1−xN/CrN multilayer coatings were fabricated by magnetron sputtering and those hardness variations were studied by observing the crack propagation and measuring the chemical bonding state of nitrides by Ti addition. While AlN/CrN multilayer shown stair-like crack propagation, AlxTi1−xN/CrN multilayer illustrated straight crack propagation. Most interestingly, Ti addition induced more broken nitrogen bonds in the nitride multilayers, leading to the reduction of hardness. However, the hardness of Al0.25Ti0.75N/CrN multilayer, having high Ti contents, increased by the formation of many Ti–N bond again instead of Al–N bond. From these results, we found that linear crack propagation behavior was dominated by broken nitrogen bonds in the AlxTi1−xN/CrN multilayer coatings.
URI
http://pubs.kist.re.kr/handle/201004/44262
ISSN
15334880
Appears in Collections:
KIST Publication > Article
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