Abstract
The paper presents the results of researches on obtaining and structure of high temperature resistance coatings on superalloys. The coatings were deposited on nickel and nickel base superalloys in two stages. During the first stage, the NiCr and NiCrHf coatings were obtained by Arc-PVD method. Basic technology, bias, arc current, rotation, parameters of deposition of NiCr and MeCrHf coatings were defined. The high efficiency of deposition of both single and two sources was observed. The targets were made by vacuum melting and machining. An influence of targets chemical composition on coating structure and chemical coatings composition was described The second stage was made by pack cementation HTLA (high temperature low activity) on 1323K chromoaluminizing process. These Arc PVD and diffusion (pack cementation) connected processes permitted to obtain MeCrAl and MeCrAlHf type of coatings. The morphology, structure and microchemical composition were characterized by scanning electron microscopy, X-ray microanalysis, energy dispersive X-ray spectroscopy and X-ray diffraction methods.
| Original language | English |
|---|---|
| Pages (from-to) | 793-800 |
| Number of pages | 8 |
| Journal | Materials Science Forum |
| Volume | 251-254 |
| Issue number | PART 2 |
| DOIs | |
| Publication status | Published - 1997 |
Keywords
- Arc-PVD Coatings
- Diffusion Coatings
- High Temperature Corrosion
- Turbine Blades
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
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