Enhanced oxidation resistance of nanocrystalline FeBSi materials

Tong, Hao; Shi, Frank G.; Lavernia, Enrique J.

doi:10.1016/0956-716x(95)90829-9

Cited by 46 publications

(20 citation statements)

References 14 publications

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“…The claimed role of diffusion in enhancing aqueous corrosion resistance of stainless steel at low temperatures, as suggested in literature [102,130] has received a strong criticism in a very recent report [124] on the basis of the very low diffusivities (i.e., 10 À40 to 10 À43 m 2 /s) at the test temperatures. A few studies [102,[130][131][132][133] have also compared the electrochemical corrosion of nanocrystalline and microcrystalline alloys with high Cr contents (>18 wt pct). Electrochemical corrosion resistance of a nanocrystalline surface of 316 stainless steel developed by surface mechanical attrition treatment (SMAT) was found to be considerably inferior to the microcrystalline unmodified bulk.…”

Section: B Fe-based Alloy Systemsmentioning

confidence: 99%

“…This behavior was attributed to the considerable increase in the 'fast diffusion channels' for ions, i.e., grain boundaries and triple junctions in the nanocrystalline material. [131] In a similar study, the corrosion resistance of nanocrystalline 309 stainless steel coating developed by DC magnetron sputtering (DCMS) (grain size <50 nm) was compared with bulk 309 stainless steel in 0.25M Na 2 SO 4 + 0.05M H 2 SO 4 ( Figure 9). [133] In the Na 2 SO 4 solution, there was a difference in the active and active-passive transition behavior of the nanocrystalline coating and bulk alloy, but the overall span of the passive region and the transpassive potentials were quite similar.…”

Section: B Fe-based Alloy Systemsmentioning

confidence: 99%

“…More importantly, the extremely fine grain size and the high volume fraction of grain boundaries of nanocrystalline (nc) alloys [12] can cause an extraordinary increase in diffusion kinetics, and therefore, the nanocrystalline structures may have beneficial effects in the development of the protective oxide layer. For example, oxidation resistance of Fe-Al and Fe-B-Si alloys in the nanocrystalline state is reported [131,168] to be superior to their oxidation resistance in microcrystalline state. This behavior is attributed to Al and Si, the well-known protective oxide film formers, being the predominantly diffusing species, respectively, in the two alloys, and the nanostructure facilitating their diffusion and expedited formation of protective films (of Al/Si oxide).…”

Section: A General Principlesmentioning

confidence: 99%

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Role of Nanostructure in Electrochemical Corrosion and High Temperature Oxidation: A Review

Mahesh

Raman

2014

Metall Mater Trans A

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The extremely fine grain size of nanocrystalline (nc) metallic alloys results in significantly different mechanical, electrochemical and oxidation properties as compared to the coarse-grained alloys of the same composition. Although the synthesis and attractive mechanical properties of nanocrystalline materials have been investigated and reviewed in great depth, the high temperature oxidation and electrochemical corrosion of these materials has received limited attention. The difference in the active dissolution and passivation behavior of nc alloys as compared to their microcrystalline counterparts varies for each alloy system. However, a unified theory explaining these phenomena still eludes us. In this context, this article reviews the progress in the electrochemical corrosion behavior of different nanocrystalline alloys, and hence, develops a better understanding of the effect of grain size, composition, interfacial phenomena and selective dissolution on corrosion of nanocrystalline alloys. This review also presents the role of nanometric grain size and the associated increase in grain boundary diffusion on the high temperature oxidation of nc alloys. The attractive possibility of enhanced oxidation resistance at lower alloying additions as compared to the coarse-grained alloys has been discussed. Although the primary focus of the article is on ferrous alloy systems, however, the lead studies on the role of ultrafine grain size in oxidation/corrosion behavior of other alloys systems have also been reviewed.

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Section: B Fe-based Alloy Systemsmentioning

confidence: 99%

Section: B Fe-based Alloy Systemsmentioning

confidence: 99%

Section: A General Principlesmentioning

confidence: 99%

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Role of Nanostructure in Electrochemical Corrosion and High Temperature Oxidation: A Review

Mahesh

Raman

2014

Metall Mater Trans A

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“…Improved oxidation resistance of FeBSi [87], Ni-based alloys [88][89][90][91][92][93], Zr and its alloys [40][41][42][43], Cr-33Nb [94], Fe-Co based alloys [95,96] and Cu-Ni-Cr alloys [97] is reported in their nanocrystalline form (in comparison to their microcrystalline counterparts). The mechanistic role of a nanocrystalline structure leading to the improved oxidation resistance is discussed below:…”

Section: Improvement In Oxidation Resistance Caused By the Nanocrystamentioning

confidence: 97%

“…The nature of the influence of nanostructure on the diffusion-assisted corrosion (viz., high temperature oxidation) depends on the role of the predominantly diffusing species in a given alloy. For example, oxidation resistances of an ironaluminide and an Fe-B-Si alloy in the nanocrystalline state are reported to be superior to that in their microcrystalline state [87,108]. This behaviour is attributed to Al and Si, the well-known protective oxide film formers, being the predominantly diffusing species respectively in the two alloys, and the nanostructure facilitating their diffusion and expedited formation of protective films (of Al/Si oxide).…”

Section: Structure Of the Oxide Scalementioning

confidence: 99%

Oxidation Resistance of Nanocrystalline Alloys

Gupta¹,

Birbilis²,

Zhang³

2012

Corrosion Resistance

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Electrochemical Corrosion Behaviour of Nanocrystalline Materials

Elkedim

2008

Nanostructured Materials in Electrochemistry

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Nanocrystalline materials have received much attention as a result of their unique physical, chemical and mechanical properties, and have been the subjects of intensive research activities both in the scientific and industrial communities.Nanocrystalline materials -that is, single or multiphase polycrystalline solids with a characteristic grain size of a few nanometers -represent a promising class of new materials. Owing to the extremely small crystallite dimensions (typically 1 to 100 nm), they are characterized structurally by a large volume fraction of interfaces which may lead to improvements in a variety of properties [1].Current spending on corrosion-related problems accounts for more than 3% of the worlds gross domestic product (GDP), and characterization of the corrosion behavior of nanocrystalline materials is important both for prospective engineering applications and for a better understanding of the above fundamental physicochemical properties [2,3]. In many cases the industrial application of novel materials will ultimately depend on their corrosion resistance over extended periods of service. For this reason, corrosion problems must be considered at an appropriate stage of material development.A limited number of investigations have concentrated on the corrosion of nanocrystalline materials. Rofagha et al. [4,5] studied nanocrystalline Ni and Ni-P produced by an electrodeposition technique, whereupon the observed behaviour was considered to be consistent with substantial contributions to the bulk electrochemical behavior from the intercrystalline regions (i.e., grain boundaries and triple junctions) of these materials.Inturi and Szklarska-Smialowska [6] have observed improved localized corrosion resistance in HCl for sputter-deposited nanocrystalline type 304 stainless steel in comparison with conventional material, and attributed this to the fine grain size and homogeneity of the nanocrystalline materials. Thorpe et al. [7] studied the corrosion behavior of nanocrystalline Fe 32 Ni 36 Cr 14 P 12 B 6 alloy obtained by crystallization of the melt-spun amorphous ribbon. These authors determined that the corrosion resistance of this material was significantly greater than that of its amorphous counterpart, and attributed the improvement to the observed greater Cr enrichment of the electrochemical surface via rapid interphase boundary diffusion [8].It is difficult to predict the electrochemical behavior of nanocrystalline materials from the known properties of their coarse-grained polycrystalline analogues. Thus, several groups have observed that nanocrystalline materials exhibit enhanced oxidation and corrosion resistance compared to their conventional microcrystalline counterparts [9][10][11][12]. In contrast, results obtained in other studies have shown nanocrystalline materials to have higher rates of dissolution and corrosion [13,14].The aim of this chapter is to outline the aqueous corrosion research activities currently being undertaken on nanocrystalline materials, with key results being extrac...

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Enhanced oxidation resistance of nanocrystalline FeBSi materials

Cited by 46 publications

References 14 publications

Role of Nanostructure in Electrochemical Corrosion and High Temperature Oxidation: A Review

Role of Nanostructure in Electrochemical Corrosion and High Temperature Oxidation: A Review

Oxidation Resistance of Nanocrystalline Alloys

Electrochemical Corrosion Behaviour of Nanocrystalline Materials

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