- Title
- Microstructural analysis of in-situ reacted Ti2AlC mAX phase composite coating by laser cladding
- Creator
- Richardson, Peter; Cuskelly, Dylan; Brandt, Milan; Kisi, Erich
- Relation
- Surface and Coatings Technology Vol. 385, Issue 15 March 2020, no. 125360
- Publisher Link
- http://dx.doi.org/10.1016/j.surfcoat.2020.125360
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2020
- Description
- Laser cladding was investigated as a method for the in-situ synthesis of Ti-Al-C MAX phase coatings due to its speed compared with standard powder metallurgy methods, localized high power density and small heat affected zone. A 2Ti:Al:C coating on a pure Ti substrate was targeted using a stoichiometric elemental powder ratio, resulting in a dense, well bonded composite coating of three layers totalling 1.33 ± 0.02 mm thick. A thin overlayer containing Ti2AlC MAX phase as the majority phase was produced at the coating surface, offering evidence for the feasibility of in-situ synthesis of a MAX phase by laser cladding with an elemental powder feed-stock. Quantitative phase analysis of XRD data indicated that the coating contained Ti2AlC as the majority phase at the coating surface, along with a uniform distribution of TiC0.64, Ti3Al and TiAl. A maximum Vickers hardness of HV 811 ± 11 was observed in the sub-surface region of the coating.
- Subject
- max phase; laser cladding; Ti2AlC; coating; titanium aluminide; titanium carbide; SDG 9; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1438912
- Identifier
- uon:40763
- Identifier
- ISSN:0257-8972
- Language
- eng
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