Structural and magnetic investigation of metastable alloy phases in Bi–Co multilayers

Yang, Guang; Chen, J.B.; Pan, Feng

doi:10.1016/s0925-8388(03)00655-8

Cited by 5 publications

(2 citation statements)

References 25 publications

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“…This is of particular importance in combustion engines where over 30% of the fuel losses are attributed to friction. Bulk bismuth/cobalt nanocomposites may further be suggested for specific magnetic applications since Bi/Co thin films have been reported to exhibit promising magnetic properties. − …”

Section: Introductionmentioning

confidence: 99%

Bottom-up Fabrication of Metal/Metal Nanocomposites from Nanoparticles of Immiscible Metals

et al. 2009

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The combination of immiscible metals has traditionally escaped preparation as such metal's largely different surface energies lead to nonwetting and separation of the two metals during synthesis. The simultaneous preparation of two metals as nanoparticles in a gas phase process can result in the formation of random agglomerates if rapidly cooled. Compaction and subsequent sintering then allows combining otherwise immiscible metals in a bottom-up approach to form metal/metal nanocomposites. In this work, bismuth and cobalt were chosen as model materials which cannot be alloyed by traditional metallurgy due to their large difference in physical properties such as hardness and melting point. Combining bismuth with cobalt (continuous phase) at the nanometer scale resulted in a metal/metal nanocomposite. This class of materials is formally an extension of the current oxide/metal nanocomposites which we conceptually demonstrated through the combination of two distinctly different properties of the composite's base metals: The bismuth/cobalt nanocomposite displayed a low friction value of around 0.2 (a property of soft bismuth) while maintaining a high hardness (a property of nanocrystalline cobalt). These previously difficult to access properties are attractive for the development of lead-free bearings in energy efficient engines.

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Section: Introductionmentioning

confidence: 99%

Bottom-up Fabrication of Metal/Metal Nanocomposites from Nanoparticles of Immiscible Metals

et al. 2009

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“…The semimetal bismuth (Bi) is a valuable material with many particular properties, such as high anisotropic Fermi surface, small energy overlap (about 38 meV at 77 K) between the L-point conduction band and the T-point valence band [10]. Alloys containing Bi are very important in many fields [11]. Among them, bismuth sulfide (Bi 2 S 3 ) is a direct band gap semiconductor with an E g of 1.30 eV that is useful in photovoltaic materials and photodiode arrays; it also belongs to a family of solid-state materials with applications in thermoelectric-cooling technologies based on the Peltier effect [12,13].…”

Section: Introductionmentioning

confidence: 99%

In situ synthesis of Bi/Bi2S3 heteronanowires with nonlinear electrical transport

Xiao

Yang

Dou

et al. 2008

Journal of Alloys and Compounds

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A Local Minimax Method Using Virtual Geometric Objects: Part I—For Finding Saddles

Zhou

2018

J Sci Comput

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Structural and magnetic investigation of metastable alloy phases in Bi–Co multilayers

Cited by 5 publications

References 25 publications

Bottom-up Fabrication of Metal/Metal Nanocomposites from Nanoparticles of Immiscible Metals

Bottom-up Fabrication of Metal/Metal Nanocomposites from Nanoparticles of Immiscible Metals

In situ synthesis of Bi/Bi2S3 heteronanowires with nonlinear electrical transport

A Local Minimax Method Using Virtual Geometric Objects: Part I—For Finding Saddles

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