Pack-Boriding of Pure Iron with Powder Mixtures Containing ZrB 2
High Temperature Materials and Processes, vol.38, no.2019, pp.342-346, 2019 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 38 Issue: 2019
- Publication Date: 2019
- Doi Number: 10.1515/htmp-2017-0081
- Journal Name: High Temperature Materials and Processes
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.342-346
- Keywords: boride layer, boriding, boriding agent, microhardness, ZrB 2
- Open Archive Collection: AVESIS Open Access Collection
- Isparta University of Applied Sciences Affiliated: Yes
Abstract
Boriding of pure iron was investigated using the powder pack method with boriding powder mixtures containing different weight fractions of ZrB 2 (5%, 10%, 15% and 20%). The samples were borided in an electric resistance furnace for an exposure time of 4 h at 1,173 K temperature under atmospheric pressure. Borided samples were characterized by optical microscopy, X-ray diffraction analyses and microhardness tests. Results showed that the boride layers consisted mainly of FeB and Fe 2 B phases. No significant difference in boride layer thicknesses (average 140 μm) could be observed as a function of ZrB 2 content. The needle-like morphology of the boride layer became more prominent with increasing weight fraction of ZrB 2 in the boriding powders. The average microhardness of the boride layer decreased with increasing ZrB 2 content due to changes in the morphology of the boride layer.