Effects of Fe additions on self propagating high temperature synthesis characteristics of TiO2–Al–C system

Sharifitabar, M.; Khaki, Jalil Vahdati; Sabzevar, Mohsen Haddad

doi:10.1016/j.ijrmhm.2014.07.006

Cited by 38 publications

(10 citation statements)

References 31 publications

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“…Measuring the adiabatic temperature of reaction 1, according to Merzhanov's empirical criterion in Eq. 2, will show that the adiabatic temperature of this reaction with 55wt % Mo reaches to 2613K which is much higher than the Merzhanov's acceptance criterion (T ad > 1800K) and therefore it can be classified in the range of self-propagation high temperature synthesis reactions (SHS) [15,[23][24].…”

Section: J Min Metall Sect B-metall 54 (2) B (2018) 233 -241mentioning

confidence: 93%

Formation mechanism of Fe-Mo master alloy by aluminothermic reduction of MoS2-Fe2O3 in the presence of lime

Golmakani

Khaki

Babakhani

2018

J min metall B Metall

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The reaction mechanism of MoS 2-Fe 2 O 3 aluminothermic reduction in the presence of lime using microwave-assisted combustion synthesis method was surveyed. Achieving technical feasibility in one-step production of ferromolybdenum along with sulfur removing in solid form are the main features of this novel process. Simultaneous Preliminary thermoanalytical investigations DSC/TGA and X-ray diffraction experiments during the heating process of 0.42MoS 2 +1.14Al + 0.29Fe 2 O 3 +0.84CaO demonstrated four key sequential endothermic and exothermic reactions at 420, 540, 660, and 810 o C. The most noteworthy reactions involve evaporation of moisture and volatile matter, molybdenite roasting, simultaneous production of lateral compounds such as CaMoO 4 and CaSO 4 , aluminum melting transition, and final termite reaction. Kinetics procedure of the system was conducted using a classical model-free approach by Kissinger-Akahira-Sunose (KAS) method. In this study, the activation energy was determined about 106.4 (kJ.mol-1) for thermite reaction in the temperature range of 810 to 918 o C.

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Section: J Min Metall Sect B-metall 54 (2) B (2018) 233 -241mentioning

confidence: 93%

Formation mechanism of Fe-Mo master alloy by aluminothermic reduction of MoS2-Fe2O3 in the presence of lime

Golmakani

Khaki

Babakhani

2018

J min metall B Metall

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“…The adiabatic temperature (T ad ) which is the highest temperature that a reaction system can reach in adiabatic conditions is a criterion which usually is used to find the theoretical stability instability regions of a combustion synthesis system. In a reaction system, the adiabatic temperature can be calculated using the following formula [7,9,10]:…”

Section: Thermodynamic Considerationsmentioning

confidence: 99%

“…So, in the previous formula, T tr is the transformation temperature and ΔH tr is the molar enthalpy of transformation. Also, if a material is added to the reaction as diluents, its heat capacity should be added to the product's heat capacity [7]. According to the experimental criterion of Merzhanov [11][12][13], in an exothermic reaction if the calculated Table 2 Chemical compositions of the products measured by atomic absorption spectroscopy analysis.…”

Section: Thermodynamic Considerationsmentioning

confidence: 99%

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Fabrication of in situ Al2O3 reinforced nanostructure 304 stainless steel matrix composite by self-propagating high temperature synthesis process

et al. 2015

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“…There are some investigations of the effect of iron metal [26,31,32] or zirconia [33] addition on the mechanical properties of Al 2 O 3 -TiC ceramic composites fabricated by SHS technique.…”

Section: Introductionmentioning

confidence: 99%

Effect of zirconia and iron on the mechanical properties of Al2O3/TiC composites processed using combined self-propagating synthesis and direct consolidation technique

Ahmed

Zaki

Besisa

et al. 2017

Materials Science and Engineering: A

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Self-propagating high temperature synthesis combined with direct consolidation technique was used to synthesize high density Al 2 O 3 /TiC composites from mixture of TiO 2 , Al and graphite powders. The effect of controlled amount of zirconia and iron addition on the density, microstructure and the mechanical properties of the composites was investigated. The results revealed that, addition of either 1.0 mole zirconia or 5.0 wt% of iron metal powder led to a significant decrease in the sample porosity from 7.0 to less than 1.0 vol% together with a remarkable enhancement in the microhardness from 6.0 to 11.0 and 12.0 GPa with 1.0 mole zirconia and 5.0 wt% iron additions, respectively. Moreover, the fracture toughness increased from 3.5 to 6.0 and 7.0 MPa.m 1/2 with 1.0 mole zirconia and 15 wt% iron additions, respectively. However, addition of 1.0 mole zirconia with 5.0 wt% iron powder led to a composite with higher porosity and reduced mechanical properties.

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Effects of Fe additions on self propagating high temperature synthesis characteristics of TiO2–Al–C system

Cited by 38 publications

References 31 publications

Formation mechanism of Fe-Mo master alloy by aluminothermic reduction of MoS2-Fe2O3 in the presence of lime

Formation mechanism of Fe-Mo master alloy by aluminothermic reduction of MoS2-Fe2O3 in the presence of lime

Fabrication of in situ Al2O3 reinforced nanostructure 304 stainless steel matrix composite by self-propagating high temperature synthesis process

Effect of zirconia and iron on the mechanical properties of Al2O3/TiC composites processed using combined self-propagating synthesis and direct consolidation technique

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