Abstract
To clarify the mechanism of plasma nitriding, we examined the optical microstructure, the hardness, the precipitation, and the concentration of dissolved nitrogen in Fe-18Cr-9Ni nitrided using plasma in the range of 723-823 K. Compared with ammonia-gas nitriding, the features of plasma nitriding are the formation of small chromium-nitride precipitates (CrN), the absence of an externally nitrided layer, the high concentration of dissolved nitrogen, and the high hardness (HV=1200). The diffusion coefficient of nitrogen in the present alloy was determined using the growth rate of the internally nitrided layer, based on calculations used in internal oxidation. Plasma- and gas-nitriding were also compared with respect to the growth rate of the nitrided layer.
| Original language | English |
|---|---|
| Pages (from-to) | 143-156 |
| Number of pages | 14 |
| Journal | Oxidation of Metals |
| Volume | 36 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - Aug 1991 |
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Keywords
- CrN precipitates
- Fe-18Cr-9Ni
- kinetics
- nitrogen diffusion
- plasma nitriding
ASJC Scopus subject areas
- Metals and Alloys
Cite this
Plasma nitriding of Fe-18Cr-9Ni in the range of 723-823 K. / Kuwahara, H.; Matsuoka, H.; Takada, J.; Kikuchi, S.; Tomii, Y.; Tamura, I.
In: Oxidation of Metals, Vol. 36, No. 1-2, 08.1991, p. 143-156.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Plasma nitriding of Fe-18Cr-9Ni in the range of 723-823 K
AU - Kuwahara, H.
AU - Matsuoka, H.
AU - Takada, J.
AU - Kikuchi, S.
AU - Tomii, Y.
AU - Tamura, I.
PY - 1991/8
Y1 - 1991/8
N2 - To clarify the mechanism of plasma nitriding, we examined the optical microstructure, the hardness, the precipitation, and the concentration of dissolved nitrogen in Fe-18Cr-9Ni nitrided using plasma in the range of 723-823 K. Compared with ammonia-gas nitriding, the features of plasma nitriding are the formation of small chromium-nitride precipitates (CrN), the absence of an externally nitrided layer, the high concentration of dissolved nitrogen, and the high hardness (HV=1200). The diffusion coefficient of nitrogen in the present alloy was determined using the growth rate of the internally nitrided layer, based on calculations used in internal oxidation. Plasma- and gas-nitriding were also compared with respect to the growth rate of the nitrided layer.
AB - To clarify the mechanism of plasma nitriding, we examined the optical microstructure, the hardness, the precipitation, and the concentration of dissolved nitrogen in Fe-18Cr-9Ni nitrided using plasma in the range of 723-823 K. Compared with ammonia-gas nitriding, the features of plasma nitriding are the formation of small chromium-nitride precipitates (CrN), the absence of an externally nitrided layer, the high concentration of dissolved nitrogen, and the high hardness (HV=1200). The diffusion coefficient of nitrogen in the present alloy was determined using the growth rate of the internally nitrided layer, based on calculations used in internal oxidation. Plasma- and gas-nitriding were also compared with respect to the growth rate of the nitrided layer.
KW - CrN precipitates
KW - Fe-18Cr-9Ni
KW - kinetics
KW - nitrogen diffusion
KW - plasma nitriding
UR - http://www.scopus.com/inward/record.url?scp=0026206503&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0026206503&partnerID=8YFLogxK
U2 - 10.1007/BF00938459
DO - 10.1007/BF00938459
M3 - Article
AN - SCOPUS:0026206503
VL - 36
SP - 143
EP - 156
JO - Oxidation of Metals
JF - Oxidation of Metals
SN - 0030-770X
IS - 1-2
ER -