| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1639298 | Transactions of Nonferrous Metals Society of China | 2010 | 8 Pages |
Abstract
An 8 mm-high NiCoCrAlYTa coating was epitaxially built-up on a directionally solidified (DS) Ni-based superalloy blade tip by electro-spark deposition. Epitaxial morphologies of the coating and its microstructural characteristics were investigated by means of SEM, XRD and TEM etc. It is observed that the fine column-like dendrites originated from the γ'-particles or γ'-clusters of the DS substrate and are un-continuously coarsened. The β-phase particles precipitate and grow eutectically with the γ-phase. The orientation of fine column dendrites depends on electro-spark deposition processing parameters and the microstructure can be characterized with superfine γ and β phases.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
