Synthesis and properties of MoSi2 alloyed with aluminum

Zhang, Houan; Long, C. M.; Chen, Ping; Guo-Ning, Tang; Liu, Xinyu

doi:10.1016/s0263-4368(03)00003-9

Cited by 26 publications

(10 citation statements)

References 21 publications

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“…The formation of a-and b-MoSi 2 during ball milling has already been reported in the open literature although most studies have concentrated on molybdenum disilicide formation starting from elemental mixtures of Mo and Si powders [27][28][29][30][31][32][33][34][35][36]. In that case, b-MoSi 2 is formed after milling of Mo and Si that are first transformed into a-MoSi 2 [34][35][36]38].…”

Section: Resultsmentioning

confidence: 98%

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Effect of Al addition on the microstructure and low-temperature reactivity to oxygen of pre-formed MoSi2

et al. 2012

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The effect of aluminum addition on the structural and low-temperature oxidation behavior of commercially available MoSi 2 was investigated by means of X-ray diffraction and thermogravimetric analysis. MoSi 2 ? x Al compounds (with x = 0.0, 0.10, 0.20, 0.30, and 0.40) were mechanically processed for 6 h starting from a-MoSi 2 and Al powders. It is shown that Al can substitute Si atoms in pre-formed MoSi 2 leading to the formation of b-MoSi 2 (the high temperature phase). The unit cell volume of b-MoSi 2 increases linearly with the Al content. For x \ 0.20, a clear onset temperature for the oxidation of MoSi 2 is discernable at ca. 420°C, while it is barely noticeable for x C 0.20. The normalized mass gain decreases from *12 % m -2 to less than 2 % m -2 when the Al content varies from 0.0 to 0.2. For x C 0.20, the normalized mass gain stays constant at less than 2 % m -2 .

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Section: Resultsmentioning

confidence: 98%

“…Several preparation methods have been designed specifically to take advantage of the exothermicity of the reaction. This is the case for MoSi 2 prepared by combustion and self-propagating high temperature synthesis [25,26] and by mechanical alloying [27][28][29][30][31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Effect of Al addition on the microstructure and low-temperature reactivity to oxygen of pre-formed MoSi2

et al. 2012

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“…Accordingly, residual stress produced by cooling would be expected to be reduced largely. On the other hand, plastic deformation within the interlayers of a joint is one mechanism that can partially relieve these stresses, according to finite element analysis and experimental findings previously [1,2], when residual stress is larger than the yield strength of materials, microcrack and failure in the joint would be produced through the low-toughness MoSi 2 . The SEM observations of the interfaces of graded interlayers within the joint are shown in Fig.…”

Section: Microstructural Observationsmentioning

confidence: 89%

“…• ), moderate density, excellent oxidation resistance, good electrical conductivity and stability in a variety of corrosive environments [1][2]. There are several potential applications that have been identified for MoSi 2 in the aerospace, automotive, energy sources and so on [3][4].…”

Section: Introductionmentioning

confidence: 99%

Characterizations and Evaluations on the Bonding Quality of Molybdenum Disilicides

Lu¹,

Qin²

2011

Archives of Metallurgy and Materials

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In this study, we proposed a new method using the spark plasma sintering technique to bond ceramics to alloys. MoSi 2 and 316L stainless steel were chosen as sample materials and can be welded well with graded interlayers. We found that dense uniformed bondings were achieved because of the comparable coefficient of thermal expansion of the interlayers. Furthermore, such a compatibility between the graded interlayers prevented MoSi 2 with low toughness from the occurrence of microcracks resulted from the residual stresses formed during cooling of the bondings.Keywords: MoSi 2 ; 316L Stainless steel; Bonding; Sintering W pracy zaproponowano nową metodę łączenia ceramiki i stopów metodą spiekania iskrowo plazmowego SPS (spark plasma sintering). MoSi 2 i stal nierdzewna 316L zostały wybrane jako przykładowe materiały i mogą być łączone poprzez gradientowe warstwy pośrednie. Okazało się, że zwarte, jednorodne połączenia zostały uzyskane dzięki porównywalnemu współczynnikowi rozszerzalności cieplnej warstw pośrednich. Ponadto, tego rodzaju zgodność pomiędzy warstwami pośredni-mi zapobiegła wystąpieniu mikropęknięć w MoSi 2 , który jest materiałem o niskiej twardości, będących wynikiem naprężeń powstałych podczas chłodzenia połączeń.

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“…[1,2] There are several potential applications that have been identified for MoSi 2 in the aerospace, automotive, energy sources and so on. [3,4] In order for MoSi 2 to be used in various industries, it is necessary to join it to other materials, such as ferrous and non-ferrous alloys, since such ceramics are generally brittle.…”

Section: Introductionmentioning

confidence: 99%

Exploration of Joining Between Ceramics and Steels: An Example Using the Spark Plasma Sintering Technique

Dong-mei

Wen

Qin

2011

J. Phase Equilib. Diffus.

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In this study, we proposed a new method using the spark plasma sintering technique to join ceramics to alloys. MoSi 2 and 316L stainless steel were chosen as sample materials and can be welded well with graded interlayers. We found that dense uniformed joints were achieved because of the comparable coefficient of thermal expansion of the interlayers. Furthermore, such a compatibility between the graded interlayers prevented MoSi 2 with low toughness from the occurrence of microcracks resulted from the residual stresses formed during cooling of the joint.

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Synthesis and properties of MoSi2 alloyed with aluminum

Cited by 26 publications

References 21 publications

Effect of Al addition on the microstructure and low-temperature reactivity to oxygen of pre-formed MoSi2

Effect of Al addition on the microstructure and low-temperature reactivity to oxygen of pre-formed MoSi2

Characterizations and Evaluations on the Bonding Quality of Molybdenum Disilicides

Exploration of Joining Between Ceramics and Steels: An Example Using the Spark Plasma Sintering Technique

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