Reactivity in the Al2O3-AlN-MgO system. The MgAlON spinel phase

Granon, A.; Goeuriot, Patrice; Thévenot, F.; Guyader, J.; L'Haridon, P.; Laurent, Y.

doi:10.1016/0955-2219(94)90012-4

Cited by 72 publications

(35 citation statements)

References 3 publications

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“…The maximal amount of AlN and Al 2 O 3 dissolved into MgAl 2 O 4ss increases with the increasing heating temperature 7 and N diffusion is considered to be the rate controlling of MgAlON formation.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Magnesium Aluminum Oxynitride by Carbothermal Reduction and Nitridation Process

Dai

Lin²,

明良³

et al. 2007

J. Ceram. Soc. Japan

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Carbothermal reduction and nitridation CRN process was utilized to prepare magnesium aluminum oxynitride MgAlON and the influence of reaction variables, such as heating temperature, soaking time and the source of carbon, on the formation of MgAlON was investigated. In addition, the density of samples prepared under different route was compared. The results show that volatile gases, Mg g in chief, lead to variation in lattice constant and chemical composition at high temperature, and decrease the sintering effect. Since high temperature and low CO partial pressure are favorable to the CRN reaction in view of thermodynamic reason and high temperature also favors the transport of gases, the rate of CRN reaction increases with the increasing temperature. Due to the difference in reactivity between graphite and carbon black, CRN reaction may be the rate controlling step when graphite is used and solid solution of AlN may be the controlling step when carbon black is utilized. CRN reaction can increase surface energy of reaction materials and results in higher final density. However, gases in the system retard the densification effect.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Magnesium Aluminum Oxynitride by Carbothermal Reduction and Nitridation Process

Dai

Lin²,

明良³

et al. 2007

J. Ceram. Soc. Japan

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“…[2][3][4] Therefore, MgAlON can be used as high-performance refractories. [1,[5][6] As mentioned above, MgAlON can be used in refractory materials.…”

Section: Introductionmentioning

confidence: 99%

Testing of the Oxidation Resistance of MgAlON Materials with Non-isothermal Oxidation Method

Wang¹,

Xu²,

Xiao³

et al. 2017

dtmse

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weight gain per unit area, The initial oxidation temperatures and the maximum oxidation rate temperatures, MgAlON.Abstract. In order to establish a standardized testing method for the oxidation resistance of refractory materials, one of their most important properties, China national standard GB/T 32329-2015 has been issued in 2015, which title is "Test method for oxidation resistance of oxynitride materials-non-isothermal oxidation". GB/T 32329-2015 provides a standard characterizing method for oxidation resistance. In this paper we validate this standard through testing the oxidation resistance of six MgAlON samples with the non-isothermal oxidation method described in this standard. We conclude that the oxidation resistance property of MgAlON materials could be well described with these indicators: the oxidation weight gain per unit area, the initial oxidation temperatures and the maximum oxidation rate temperatures. Our experiments show that this method is scientific and feasible.

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“…It should be noted that this oxide-nitride diagram does contain the considerable potential nitrospinel solid solution series (spinel MgAl2O4 to Al5O6N, complete miscibility at 1 750°C). 10) To help with analyzing that plot, examples of individual inclusions are shown together with their respective plotting positions on the coupled triangles in Fig. 4 for Heat A, and Fig.…”

Section: Compositional Plotsmentioning

confidence: 99%

Analysis and Significance of Non-metallic Inclusions in Non Grain-oriented Electrical Steel

et al. 2013

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NMI in electrical steels are known to have a very complex chemical makeup and history of formation, and exert a large influence on the handling of this steel in secondary metallurgy and casting. We have developed routines to analyse the non-metallic inclusion contents of non grain-oriented electrical steels by automated FEG-SEM analysis. We automatically analyze NMI of sizes down to 0.08 μm 2 in a steel that has significant amount of alloyed Si (2.3 wt%) by employing a matrix spectrum subtraction routine that leaves only the signal of the NMI itself to be quantified. We describe data reduction procedures for the NMI populations that consist out of duplexing oxides, sulfides, and nitrides. The chemical complexity can be represented and understood in terms of using a multicomponent projection technique, and based on the analysis of the particles it is possible to calculate quantitatively the amount of elements contained in the NMI assemblage of a steel sample. We find that this mass balance gives results in good to excellent agreement with bulk steel analyses for elements that are dominantly inclusion bound, such as Ca, if the complete inclusion size range above 0.08 μm 2 is taken into account. Based on these data analysis methods, we compare the NMI development in two heats through the secondary metallurgy process. Although the same steel composition was alloyed, the NMI developed vastly different depending on the details of treatment on the ladle furnace.KEY WORDS: electrical steel; non-metallic inclusions; automated inclusion analysis; ladle metallurgy.

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Reactivity in the Al2O3-AlN-MgO system. The MgAlON spinel phase

Cited by 72 publications

References 3 publications

Synthesis of Magnesium Aluminum Oxynitride by Carbothermal Reduction and Nitridation Process

Synthesis of Magnesium Aluminum Oxynitride by Carbothermal Reduction and Nitridation Process

Testing of the Oxidation Resistance of MgAlON Materials with Non-isothermal Oxidation Method

Analysis and Significance of Non-metallic Inclusions in Non Grain-oriented Electrical Steel

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