Mechanical activation effect on the self-sustaining combustion reaction in the Mo–Si system

Gras, Ch.; Vrel, D.; Gaffet, Éric; Bernard, Frédéric

doi:10.1016/s0925-8388(00)01221-4

Cited by 107 publications

(41 citation statements)

References 36 publications

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“…Mechanical activation of the reactants (MASHS and M2AP) has been proven to greatly reduce ignition time and temperature in many combustion reactions of aluminides, silicides and carbides [27e32]. However, a typical feature of most combustion synthetic products is porosity (for example, Gras et al [29] and Gauthier et al [30] measured a porosity of the order of 40e50%) and the need for a subsequent consolidation step. Recently, success in forming dense bulk nanostructures, iron and niobium aluminides, was achieved, respectively, by spark plasma synthesis and fieldactivated pressure-assisted synthesis of mechanically activated powders (MASPS and MAFAPAS, respectively) [33,34].…”

Section: Introductionmentioning

confidence: 99%

Reactive extrusion synthesis of mechanically activated Ti–50Ni powders

Neves¹,

Martins²,

Correia³

et al. 2007

Intermetallics

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Section: Introductionmentioning

confidence: 99%

Reactive extrusion synthesis of mechanically activated Ti–50Ni powders

Neves¹,

Martins²,

Correia³

et al. 2007

Intermetallics

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“…14,15) The so-called MASHS (mechanicallyassisted self-propagating high temperature synthesis) method consists of a high-energy ball milling step followed by a selfsustaining reaction. This process combines the advantages of mechanical alloying and self-propagation high temperature synthesis.…”

Section: Introductionmentioning

confidence: 99%

“…15) In this study, this work presented preparation and characterization of MoSi 2 /WSi 2 composites from MASHSed powders. The composites showed excellent mechanical properties and good oxidation resistance at lower temperature.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of MoSi<sub>2</sub>/WSi<sub>2</sub> Composites from MASHSed Powder

Wang

Weng

et al. 2015

Mater. Trans.

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MoSi 2 based materials are considered to have potential for use in high temperature structural part. In this work, MoSi 2 /WSi 2 composites have been successfully prepared by pressureless sintering from mechanically-assisted combustion synthesized powders. The size of green powders shows great impact on the properties of sintered samples. The sample obtained from smaller powders has finer microstructure, and its Vickers hardness, flexural strength and fracture toughness were as high as 10.78 GPa, 327.21 MPa and 7.32 MPa m 1/2 , respectively. The morphologies of the fractured surface of the composites revealed the mechanism to improve the mechanical properties of MoSi 2 matrix. Moreover, this composite exhibits good oxidation resistance at low temperature. A continuous SiO 2 layer was formed after exposure to air at 500°C for 120 hours, which could prevent further oxidation of the composite.

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“…It has been observed in many systems that preliminary MA of reactants brought about a decrease in both the ignition and combustion temperatures and an increase in the conversion degree [12][13][14][15][16][17]. The mechanical activation has also been reported responsible for the reduction of the minimum nitrogen pressure required for the CS of Si 3 N 4 [18].…”

Section: Introductionmentioning

confidence: 99%

Mechanical-activated, combustion synthesis of β-SiAlON

Akiyama

2010

Journal of Alloys and Compounds

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In this paper, β-Si 6-z Al z O z N 8-z (z = 1) powder was synthesized via combustion synthesis (CS) assisted with mechanical activation by a high energy planetary ball milling under various nitrogen pressures (0.7, 1.0, 1.5, and 2.5 MPa). The effect of ball milling time and nitrogen pressure on the reaction rate and microstructure of CSed products were investigated using XRD and SEM. The effect on the nitrogen pressure required for CS of β-SiAlON was also examined. The results show that prolonged milling time was effective for enhancing the reactivity of raw materials and also for promoting the conversion rate of β-SiAlON. The mechanical activation also minimized nitrogen pressure required for the CS of β-SiAlON, which the reaction can self-propagate at only 0.7 MPa in nitrogen pressure. Significantly, the rod-like crystals agglomerated together with increasing ball milling time, and became longer and thicker with increasing nitrogen pressure.

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Mechanical activation effect on the self-sustaining combustion reaction in the Mo–Si system

Cited by 107 publications

References 36 publications

Reactive extrusion synthesis of mechanically activated Ti–50Ni powders

Reactive extrusion synthesis of mechanically activated Ti–50Ni powders

Preparation and Characterization of MoSi<sub>2</sub>/WSi<sub>2</sub> Composites from MASHSed Powder

Mechanical-activated, combustion synthesis of β-SiAlON

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