Regularities and mechanism for self-cleaning from impurity oxygen in obtaining molybdenum disilicide by shs method

Bloshenko, V. N.; Bokii, V. A.; Borovinskaya, I. P.

doi:10.1007/bf01463737

Cited by 9 publications

(10 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By comparing Eq. Using this approach, the activation energy of the Mo 1 2Si reaction to form MoSi 2 has been obtained by Bloshenko et al 20 and Zhang and Munir. (2), it can be seen that Lakshmikantha and Sekhar's modifications affect only the pre-exponential factor.…”

Section: Discussionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] The underlying principle in this technique involves the use of self-sustaining exothermic (combustion) reactions between elemental and/or compound powders. The effects of process parameters on the combustion reactions [17][18][19] as well as the purity 20 and sinterability 21 of the combustion synthesized MoSi 2 have been studied. Once initiated, a highly exothermic reaction will become self-sustaining, which then propagates as a combustion wave through the compact converting reactants into products(s).…”

Section: Introductionmentioning

confidence: 99%

“…Simply, reactant powders are pressed into a compact and ignited using external heat source. It has been concluded that the MoSi 2 prepared by the combustion method possesses reduced O 2 contamination 19,20 and is more sinterable than conventional produced materials. The investigations on the combustion reaction of molybdenum and silicon to form MoSi 2 17-19 as well as Mo 3 Si 17,18 and Mo 5 Si 3 17,18 have been reported.…”

Section: Introductionmentioning

confidence: 99%

“…[25][26][27] Despite its superior property combination, MoSi 2 suffers from low temperature brittleness and decreased strength at high temperatures. While combustion synthesis of MoSi 2 has been well studied, [17][18][19][20][21] there is little published information on the effects of Al additions on the combustion reaction of Mo and Si. In the case of MoSi 2 matrix composites, the reinforcement phases could be either refractory metals or ceramics in the form of particulates, whiskers, or fibers.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A study of micropyretic reactions in the Mo–Si–Al ternary system

1997

J. Mater. Res.

View full text Add to dashboard Cite

Micropyretic synthesis technique employs self-sustaining exothermic (combustion) reactions for the preparation of various ceramic, intermetallic, and composite materials. In the present work, the combustion reactions of Mo and Si with Al additions have been systematically studied. The atomic mixtures of the reactant powders are chosen to be Mo 1 (2 2 x)Si 1 xAl with x 0-0.4. In comparison with the Mo 1 2Si reaction which leads to the formation of MoSi 2 , the substitution of Al for Si decreases the sample ignition temperature, but increases the intensity of the combustion reactions. In addition, the substitution of Al for Si results in the formation of a ternary intermetallic phase, called molybdenum alumino-silicide Mo(Si, Al) 2 , in the synthesized product. When the content of Al in the reactant mixtures reaches 0.4, nearly single phase Mo(Si, Al) 2 is obtained and no MoSi 2 is detected in the reaction product. These influences are analyzed by using x-ray diffraction (XRD), scanning electron microscopy (SEM), and differential thermal analysis (DTA). The effect of Al additions on the reaction mechanism is also discussed.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A study of micropyretic reactions in the Mo–Si–Al ternary system

1997

J. Mater. Res.

View full text Add to dashboard Cite

show abstract

“…An advantage of the SHS process is that higher phase purities compared to conventional syntheSis are achieved. 6 However, porosity values of up to 50% persist in SHSprocessed samples. Recently, the simultaneous use of a HIPing process and SHS processing to fabricate fully dense MoSiz was reported.…”

Section: Introductionmentioning

confidence: 99%

In-situ synthesis and rapid consolidation of fully dense MoSi2

Raman¹,

Rele²,

Paskowitz³

1993

JOM

View full text Add to dashboard Cite

SHS of Silicon‐Based Ceramics for the High‐Temperature Applications

et al. 2018

View full text Add to dashboard Cite

High-temperature materials attract a growing interest from both the scientists and engineers, since the increase of the operating temperatures is crucial for the enhancement of many energy conversion processes. Another area of application of high-temperature materials is high-velocity air flight, where the ultra-high temperature ceramics (UHTCs) are pivotal for the creation of robust nose tips and leading edges of the skins of high-velocity jets. Compounds of refractory metals with silicon, such as TaSi 2 , MoSi 2 , ZrSi 2 , are characterized by unrivaled resistance in aggressive environments. However, most of them are not suitable for application as high-temperature structural materials due to the low mechanical properties. Therefore, they are frequently used as a constituent for the high-temperature composite materials such as TaSi 2 -SiC, ZrC-MoSi 2 , ZrB 2 -MoSi 2 , ZrB 2 -ZrSi 2 . One of the most convenient ways of producing these composite materials is self-propagating hightemperature synthesis (SHS), known for its high productivity, energyefficiency, and ecological safety. This review summarizes the latest developments of the SHS of the silicon-based high-temperature ceramics.

show abstract

Regularities and mechanism for self-cleaning from impurity oxygen in obtaining molybdenum disilicide by shs method

Cited by 9 publications

References 2 publications

A study of micropyretic reactions in the Mo–Si–Al ternary system

A study of micropyretic reactions in the Mo–Si–Al ternary system

In-situ synthesis and rapid consolidation of fully dense MoSi2

SHS of Silicon‐Based Ceramics for the High‐Temperature Applications

Contact Info

Product

Resources

About