Journal
MATERIALS LETTERS
Volume 128, Issue -, Pages 231-234Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2014.04.121
Keywords
XPS; Microstructure; Plasma nitriding; Austenitic stainless steel; Surfaces
Funding
- National Natural Science Foundation of China [51301149, 51179017]
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In conventional plasma nitriding process, the treated components were submitted to high cathodic potentials. In this present work, AISI 304 austenitic stainless steels were nitrided at anodic potential in plasma atmosphere. Nitriding experiments were carried out at low temperature 430 degrees C for 3 h, 6 h, and 9 h. The specimen was characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and a microhardness tester. The results showed that the nitrogen expanded austenite layer was formed on the surface during the low temperature anodic nitriding. The surface microhardness and the thickness of the hardened layers increased as the nitriding time increased. It suggested that nitrogen was present as a solid solution in the nitrided layer. (C) 2014 Elsevier B.V. All rights reserved.
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