Journal ArticleDOI
Nitriding iron at lower temperatures.
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TLDR
The microstructure in the surface layer of a pure iron plate was refined at the nanometer scale by means of a surface mechanical attrition treatment that generates repetitive severe plastic deformation of the surfaceLayer to provide a new approach for selective surface reactions in solids.Abstract:
The microstructure in the surface layer of a pure iron plate was refined at the nanometer scale by means of a surface mechanical attrition treatment that generates repetitive severe plastic deformation of the surface layer. The subsequent nitriding kinetics of the treated iron with the nanostructured surface layer were greatly enhanced, so that the nitriding temperature could be as low as 300°C, which is much lower than conventional nitriding temperatures (above 500°C). This enhanced processing method demonstrates the technological significance of nanomaterials in improving traditional processing techniques and provides a new approach for selective surface reactions in solids.read more
Citations
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疟原虫var基因转换速率变化导致抗原变异[英]／Paul H, Robert P, Christodoulou Z, et al//Proc Natl Acad Sci U S A
TL;DR: PfPMP1）与感染红细胞、树突状组胞以及胎盘的单个或多个受体作用，在黏附及免疫逃避中起关键的作�ly.
Journal ArticleDOI
Nanostructured surface layer on metallic materials induced by surface mechanical attrition treatment
TL;DR: In this article, a surface mechanical attrition treatment (SMAT) was developed for synthesizing a nanostructured surface layer on metallic materials in order to upgrade the overall properties and performance.
Journal ArticleDOI
Size dependence of nanostructures: Impact of bond order deficiency
Chang Q. Sun,Chang Q. Sun +1 more
TL;DR: The BOLS correlation mechanism has been initiated and intensively verified as discussed by the authors, which has enabled the tunability of a variety of properties of a nanosolid to be universally reconciled to the effect of bond order deficiency of atoms at sites surrounding defects or near the surface edges of the nano-material.
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Ammonia as a possible element in an energy infrastructure: catalysts for ammonia decomposition
TL;DR: The role of ammonia in future energy infrastructure is discussed in this article, where the authors focus on the catalytic decomposition of ammonia as a key step and highlight other aspects such as catalytic removal of ammonia from gasification product gas or direct ammonia fuel cells.
Journal ArticleDOI
Synthesis and characterization of a binary noble metal nitride
Eugene Gregoryanz,Chrystele Sanloup,Maddury Somayazulu,James Badro,Guillaume Fiquet,Ho-kwang Mao,Russell J. Hemley +6 more
TL;DR: The discovery and characterization of platinum nitride (PtN), the first binary nitride of the noble metals group, is reported, characterized by a very high Raman-scattering cross-section with easily observed second- and third-order Raman bands.
References
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疟原虫var基因转换速率变化导致抗原变异[英]／Paul H, Robert P, Christodoulou Z, et al//Proc Natl Acad Sci U S A
TL;DR: PfPMP1）与感染红细胞、树突状组胞以及胎盘的单个或多个受体作用，在黏附及免疫逃避中起关键的作�ly.
Journal ArticleDOI
Bulk nanostructured materials from severe plastic deformation
TL;DR: In this article, the authors present methods of severe plastic deformation and formation of nanostructures, including Torsion straining under high pressure, ECA pressing, and multiple forging.
Journal ArticleDOI
An investigation of surface nanocrystallization mechanism in Fe induced by surface mechanical attrition treatment
TL;DR: A grain refinement mechanism induced by plastic deformation during the SMA treatment in Fe was proposed in this article, which involves formation of dense dislocation walls (DDWs) and dislocation tangles (DTs) in original grains and in the refined cells under further straining.
Journal ArticleDOI
Superplastic extensibility of nanocrystalline copper at room temperature
Lei Lu,Manling Sui,Kathy Lu +2 more
TL;DR: Microstructure analysis suggests that the superplastic extensibility of the nc copper originates from a deformation mechanism dominated by grain boundary activities rather than lattice dislocation, which is also supported by tensile creep studies at room temperature.
Journal ArticleDOI
Nanocrystalline metals crystallized from amorphous solids: nanocrystallization, structure, and properties
TL;DR: A review of the state of the art in this field can be found in this article, where the current status of research and developments on the nanocrystallization, microstructure and properties of the materials are summarized.