期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 554, 期 -, 页码 89-96出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2012.11.069
关键词
Coating materials; Surfaces and interfaces; Microstructure; Transmission Electron Microscopy; TEM
资金
- Generalitat de Catalunya [2009SGR00390, 2009SGR0035]
- University of Barcelona
- CSIC
- [MAT2009-10827]
- [MAT2010-16407]
The present work evaluates the deposition behaviour of irregular titanium powder particles impinged by Cold Gas Spraying onto an aluminium 7075-T6 alloy substrate. The influence of their irregular shape on the bonding phenomena, in particle-substrate and particle-particle interfaces are discussed in view of Transmission Electron Microscopy examinations of a Focused Ion Beam lift-out prepared sample. Key aspects will be the jetting-out, the occurrence of oxide layers and grain size refinement. Different structural morphologies could be featured; at the particle-substrate interface, both the aluminium alloy and the titanium side exhibit recrystallization. Titanium particles in intimate contact in small agglomerates during deposition, on the other hand, show grain refinement at their interfaces whereas the original structure is maintained outside those boundaries. (C) 2012 Elsevier B. V. All rights reserved.
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