Mechanosynthesis of Nanocomposites

Grigorieva, Tatiana F.; Barinova, A. P.; Lyakhov, N. Z.

doi:10.1023/b:nano.0000006093.26430.3b

Cited by 53 publications

(28 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Literature reviews 14,186,471 highlight some dependences of formation, structure, and properties of mechanochemically synthesized composites in mostly metallic systems. This section considers two groups of two-component systems: light metals with flaky second component Me/X (Me = Al, Mg, Ti, Fe, Si; X = C, h-BN) and energy-saturated systems with high specific heat of interaction Me 1 /Y (Me 1 = Al, Mg, Si; Y = MoO 3 , (C 2 F 2 ) n , etc.…”

Section: Metal-ceramic Nanocompositesmentioning

confidence: 99%

Hallmarks of mechanochemistry: from nanoparticles to technology

et al. 2013

View full text Add to dashboard Cite

The aim of this review article on recent developments of mechanochemistry (nowadays established as a part of chemistry) is to provide a comprehensive overview of advances achieved in the field of atomistic processes, phase transformations, simple and multicomponent nanosystems and peculiarities of mechanochemical reactions. Industrial aspects with successful penetration into fields like materials engineering, heterogeneous catalysis and extractive metallurgy are also reviewed. The hallmarks of mechanochemistry include influencing reactivity of solids by the presence of solid-state defects, interphases and relaxation phenomena, enabling processes to take place under non-equilibrium conditions, creating a well-crystallized core of nanoparticles with disordered near-surface shell regions and performing simple dry time-convenient one-step syntheses. Underlying these hallmarks are technological consequences like preparing new nanomaterials with the desired properties or producing these materials in a reproducible way with high yield and under simple and easy operating conditions. The last but not least hallmark is enabling work under environmentally friendly and essentially waste-free conditions (822 references).

show abstract

Section: Metal-ceramic Nanocompositesmentioning

confidence: 99%

Hallmarks of mechanochemistry: from nanoparticles to technology

et al. 2013

View full text Add to dashboard Cite

show abstract

“…The volume percentage of amorphous phase in grain boundaries is not negligible in nano scale crystalline materials and it means that in fact nano grain polycrystalline materials are a composite of crystal and amorphous phases. This could be one of the explanations for the special behaviours of ultra-fine grain materials (Bonetti & Pasquini 1999;Grigorieva T. F. et al, 2003;Roland T. et al, 2006;Langdon T. G., 2010;Vincze I. et al, 1980;Löhneysen H. v., 1991).…”

Section: Introductionmentioning

confidence: 98%

A General Method for Quantifying the Amorphous Phase in Nano Polycrystalline Materials

Masudi¹,

Hashim²,

Kamari³

et al. 2012

MAS

View full text Add to dashboard Cite

The grain boundary area has a great influence on the polycrystalline material properties and in nano crystallized metals. It could be considered as a glass metal phase in addition to crystallites in a composite structure. In this research, a general procedure for directly quantifying the crystalline and amorphous phases is introduced by using an x-ray diffractometry technique.Nickel with a nano crystalline structure was deposited onto pure copper samples with grain sizes of between 17 to 124 nm by an electroplating technique. A combination of measuring the area of the XRD pattern characteristic peaks and x-ray background scattering were used for the estimation of the crystalline and amorphous volume percentages. The results show that there is a non-linear relationship between the percentage of the crystalline phase calculated by the geometrical method and the area of the selected XRD peak. An experimental formula is suggested for the calculation of the crystalline phase volume percentage of the nano structure nickel samples based on the (200) x-ray peak area.

show abstract

“…In spite of good enough clarification of mechanical alloying in various systems [13][14][15] as well as the regularit ies of formation of nanosized indiv idual silicides, in particular silicides of mo lybdenum and t itaniu m, via high energy mechanical treat ment [16][17][18][19][20][21][22], the available in formation on production of nanopowders of solid solutions of refractory compounds, especially silicides, is poor.…”

Section: Introductionmentioning

confidence: 99%

Features of the Solid Solution (Mo0.9,Cr0.1)Si2 Formation Depending on the State of Initial Mixture

Kud¹,

Ieremenko²,

Likhoded³

et al. 2013

MATERIALS

View full text Add to dashboard Cite

The regularities of solid state synthesis of the solid solution (Mo 0.9 ,Cr 0.1 )Si 2 in vacuum have been investigated in the temperature range 400-1200℃ depending on the dispersity and energetic state of the init ial powders, name ly mo lybdenum, chro miu m and silicon. The energetic state of the in itial mixture was established to be a determin ing factor which affects the principal features of solid state interaction whereas an increase in dispersity only influences the temperature of the interaction start. When non-activated initial mixtures and ones mechanically activated in a p lanetary mill with lo w number of dru m revolutions were used, the solid solution formation proceeded owing to diffusion of silicon into meta ls through successive formation of lo wer and higher molybdenum-based silicide phases followed by their interaction. Mechanical activation in a planetary mill with high number of dru m revolutions was accompanied by not only decrease in particle size but also changes in the energetic state of the reaction mixture, which resulted in changing the regularities of the solid solution formation. Herein solid solutions on the basis of two higher molybdenum silicide phases, tetra-and hexagonal mod ifications, were formed with further poly morphic transition of the unstable high temperature hexagonal β-MoSi 2 phase into the lo w temperature tetragonal α-MoSi 2 phase. It has been established that temperature of the beginning of interaction decreases by 100℃ as compared with non-activated initial mixtures and temperature o f the end of the process depends on the amount of accu mu lated energy: under low energy mechanical activation the process is co mplete at 1200℃, while a h igh energy activation decreases this temperature by 200-400℃ depending on the duration of activation.

show abstract

Mechanosynthesis of Nanocomposites

Cited by 53 publications

References 32 publications

Hallmarks of mechanochemistry: from nanoparticles to technology

Hallmarks of mechanochemistry: from nanoparticles to technology

A General Method for Quantifying the Amorphous Phase in Nano Polycrystalline Materials

Features of the Solid Solution (Mo<SUB>0</SUB><SUB>.</SUB><SUB>9</SUB>,Cr<SUB>0</SUB><SUB>.</SUB><SUB>1</SUB>)Si<SUB>2</SUB> Formation Depending on the State of Initial Mixture

Contact Info

Product

Resources

About