Effects of nitrogen on predominant sintering mechanism during the initial stage of high nitrogen nickel-free stainless steel powder
Source abstract
Abstract
In this study, gas-atomized Fe17Cr11Mn3Mo powders were nitrided to obtain different nitrogen contents for the purpose of studying the effects of nitrogen on predominant sintering mechanism during the initial stage of high nitrogen nickel-free stainless steel powder. Most of the nitrogen in both powders and sintered bodies was uniformly distributed in the form of solid solution, causing lattice distortion and thus hindering the diffusion of metal atoms. It was found that the higher the nitrogen content (0.19–0.84 wt%) in the sintered specimens, the lower the diffusion rate, and in turn the smaller the sintering-neck size. Theoretical analysis indicated that the predominant mechanism was surface diffusion . The additional activation energy caused by unit concentration of nitrogen hindering diffusion was 252.1 ± 40.4 kJ/mol, which was very close to the reported activation energy of nitrogen in FeCr steels. The results showed that the main obstacle to neck growth was solid solution nitrogen rather than surface nitrides.
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Research context
OpenAlex topics: Injection Molding Process and Properties · Advanced materials and composites · Powder Metallurgy Techniques and Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (41)
Show source-provided references
1. The P/M processing of high-nitrogen stainless steels10.1007/BF03222913 ↗
2. Influence of sintering under nitrogen atmosphere on microstructures of powder metallurgy duplex stainless steels10.1007/s11661-008-9707-y ↗
3. Biomaterials in total joint replacement10.1016/j.colsurfb.2003.12.002 ↗
4. Gavriljuk · 1999
5. S.N. Ghali, M. Eissa, H. El-Faramawy, A. Ahmed, T. Mattar, M. Mishreky, Production and application of advanced high nitrogen steel, in: Proceedings of the International Conference on Science and Technology of Ironmaking and Steelmaking, Jamshedpur, India, 2013.
6. High nitrogen containing ni-free austenitic steels for medical applications10.2355/isijinternational.36.893 ↗
7. High nitrogen nickel-free austenitic stainless steel: a promising coronary stent material10.1007/s11431-011-4679-3 ↗
8. Nickel-free austenitic stainless steels for medical applications10.1088/1468-6996/11/1/014105 ↗
9. The Fe-N (iron-nitrogen) system10.1007/BF02869273 ↗
10. On the solubility of nitrogen in liquid iron and steel alloys using elevated pressure
11. Development of high-chromium ferritic heat-resistant steels with high nitrogen content10.2355/isijinternational.ISIJINT-2017-758 ↗
12. Manufacturing and applications of high nitrogen steels10.1081/AMP-120027494 ↗
13. Development of powder metallurgy high nitrogen stainless steel10.4028/www.scientific.net/MSF.638-642.1811 ↗
14. Nitrogen strengthening of a stable austenitic stainless steel10.1016/0001-6160(87)90131-3 ↗
15. Experimental and numerical investigations on properties and quality of parts produced by MIM10.1179/003258901666383 ↗
16. A review of additive manufacturing10.5402/2012/208760 ↗
17. Sintering optimisation and solution annealing of high nitrogen nickel free austenitic stainless steels prepared by PIM10.1179/174329008X284930 ↗
18. Nitriding of Fe–18Cr–8Mn stainless steel powders by mechanical alloying method with dual nitrogen source10.1016/j.powtec.2016.02.048 ↗
19. Effect of nitrogen on sintered duplex stainless steels10.1179/003258903225010532 ↗
20. Effect of sintering atmosphere on structure and properties of austeno-ferritic stainless steels10.1016/j.msea.2009.04.011 ↗
21. Influences of sintering atmospheres on densification process of injection moulded gas atomised 316L stainless steel10.1179/003258903225005394 ↗
22. Microstructural evolution in liquid‐phase‐sintered SiC: part III, effect of nitrogen‐gas sintering atmosphere10.1111/j.1151-2916.2002.tb00361.x ↗
23. The influence of sintering in nitrogen gas on the microstructure of a WC–VC–TiC–Co cemented carbide10.1016/j.ijrmhm.2007.09.004 ↗
24. Effects of oxygen contents on sintering mechanism and sintering-neck growth behavior of Fe Cr powder10.1016/j.powtec.2018.01.036 ↗
25. Effect of oxygen contents on predominant sintering mechanism during initial stage of pure titanium powder10.1016/j.powtec.2019.11.070 ↗
26. Chromium-manganese stainless steels with nitrogen content up to 2.10 wt%10.4028/www.scientific.net/MSF.318-320.255 ↗
27. Microstructure and properties of porous high-N Ni-free austenitic stainless steel fabricated by powder metallurgical route10.3390/ma11071058 ↗
28. Gas–solid interactions during nonisothermal heat treatment of a high-strength CrMnCN austenitic steel powder: influence of atmospheric conditions and heating rate on the densification behavior10.1007/s11661-012-1234-1 ↗
29. Characterization of high-strength high‑nitrogen austenitic stainless steel synthesized from nitrided powders by spark plasma sintering10.1016/j.matchar.2019.04.005 ↗
30. Study of the initial stages of sintering solids by viscous flow, evaporation‐condensation, and self‐diffusion10.1063/1.1721874 ↗
31. Neck growth kinetics during microwave sintering of nickel powder10.1016/j.jallcom.2010.10.042 ↗
32. Microwave sintering of alumina at 2.45 GHz10.1111/j.1151-2916.2003.tb03467.x ↗
33. Neck growth kinetics during microwave sintering of copper10.1016/j.scriptamat.2009.12.036 ↗
34. A scaling law study of the initial stage of microwave sintering of iron spheres10.1016/j.scriptamat.2011.11.017 ↗
35. In situ investigation of titanium powder microwave sintering by synchrotron radiation computed tomography10.3390/met6010009 ↗
36. Study on sintering mechanism of stainless steel fiber felts by X-ray computed tomography10.3390/met6010018 ↗
37. J.M. Ruan, P.Y. Huang, Powder Metallurgy Principle, China Machine, Beijing, 2012.
38. Guo · 1998
39. G.X. Hu, X. Cai, Y.H. Rong, Fundamentals of Materials Science, Shanghai Jiaotong University, Shanghai, 2010.
40. Characterization of surface oxides on water-atomized steel powder by XPS/AES depth profiling and nano-scale lateral surface analysis10.1016/j.apsusc.2012.12.155 ↗
41. Thermodynamics and kinetics of nitrogen absorption in low carbon martensitic stainless steels