The Controlled Compound Layer of Ni-Coated Nitrided Pure Iron
| Autor: | Xuesha Li, Yu Zhang, Qianqian Shen, Li Xiang, Chaoyin Nie |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
General Chemical Engineering microstructure compound layer 02 engineering and technology engineering.material wear resistance 01 natural sciences Indentation hardness Article lcsh:Chemistry Brittleness Coating 0103 physical sciences Ni-coated pretreatment General Materials Science Composite material 010302 applied physics nitrided layer 021001 nanoscience & nanotechnology Microstructure Decomposition Wear resistance lcsh:QD1-999 engineering effective hardened layer 0210 nano-technology Layer (electronics) Nitriding |
| Zdroj: | Nanomaterials Volume 11 Issue 1 Nanomaterials, Vol 11, Iss 31, p 31 (2021) |
| ISSN: | 2079-4991 |
| Popis: | In order not to sacrifice nitrided layer thickness and reduce brittle compound layer thickness, Ni-coated pretreatment was carried out with electrodeposition on a pure iron surface, followed by gas nitriding. The brittle compound layer thickness of duplex surface treated samples was reduced, and the nitrided layer thickness increased to 320 &mu m. The microhardness was 4 times harder, and the wear loss was reduced by 68% compared with the original material. The results indicate that Ni-coated pretreatment could effectively improve microhardness and wear resistance and realize the controlled microstructure of a brittle compound layer of pure iron without compromising nitrided layer thickness. Ni coating plays an important role in ammonia adsorption and decomposition, and in the transfer of active nitrogen atoms during nitriding. |
| Databáze: | OpenAIRE |
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