Metal surface modification by plasma boronizing in a two-temperature-stage process
A two-step plasma-assisted boronizing process was performed on the AISI 1045 steel substrate to reduce the pore density introduced by a single plasma boronizing process and examine the feasibility of the process. The specimens were plasma boronized for 1 h at 650 °C and subsequently for 7 h at 800 °...
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Published in | Surface & coatings technology Vol. 197; no. 1; pp. 51 - 55 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Lausanne
Elsevier B.V
01.07.2005
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | A two-step plasma-assisted boronizing process was performed on the AISI 1045 steel substrate to reduce the pore density introduced by a single plasma boronizing process and examine the feasibility of the process. The specimens were plasma boronized for 1 h at 650 °C and subsequently for 7 h at 800 °C. Boronizing was conducted at a pressure of 266 Pa in an atmosphere of 1.5 vol.% BCl
3 (low concentration), 50 vol.% H
2 and balance Ar to minimize the effect of chlorine containing compounds, such as BCl
3, HCl, FeCl
2 and FeCl
3, on formation and growth of the boride layer. It was found that the morphology of the boride layer prepared by the two-step boronizing process was changed from a columnar to a tooth-like structure and the pores in the borided steel were eliminated completely in comparison to those synthesized by the conventional single boronizing process (25%). |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0257-8972 1879-3347 |
DOI: | 10.1016/j.surfcoat.2004.10.099 |