Reaction products of Al–Mg/B4C composite fabricated by pressureless infiltration technique

Lee, K.B.; Sim, Ho Sup; Cho, S.Y.; Kwon, Hoon

doi:10.1016/s0921-5093(00)01831-1

Cited by 82 publications

(31 citation statements)

References 13 publications

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“…The spontaneous infiltration behavior of molten metal was explained in detail in previous articles. [32,33,34] Figure 2(a) shows the relatively uniform distribution of the TiC particles in the water-quenched composite. Even though there is no agglomeration and segregation of the TiC particles, it can be seen that reaction products of various morphology and size are observed in the Al matrix, as well as in the vicinity of the TiC particles according to the fabrication conditions ((b) through (e)).…”

Section: Resultsmentioning

confidence: 99%

“…Both phases have been commonly observed in all the composites fabricated, using the present pressureless infiltration technique in the presence of Mg and nitrogen. [32,33,34] Figure 7 shows bright-field and dark-field images and selected-area diffraction patterns (SADPs) of the reaction product observed by TEM in the furnace-cooled composite. This reaction product was identified as Al 3 Ti with a tetragonal structure and lattice parameters a ϭ 3.7037 nm and c ϭ 8.4265 (theoretical value a ϭ 3.8537 nm and c ϭ 8.5839 nm, space group: I4/mmm).…”

Section: Resultsmentioning

confidence: 99%

“…The schematic arrangement employed for the composite fabrication in this study is given elsewhere. [32,33,34] The resulting microstructures and reaction products were investigated by optical microscopy, X-ray diffractometry (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). For SEM observation, specimens were prepared by dissolving away the Al matrix in a solution of methanol bromine and examined using a JEOL* 1210LV scanning electron microscope equipped with *JEOL is a trademark of Japan Electron Optics Ltd., Tokyo.…”

Section: Methodsmentioning

confidence: 99%

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Reaction products of Al/TiC composites fabricated by the pressureless infiltration technique

Lee

Sim

Kwon

2005

Metall Mater Trans A

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The interfacial reaction products of the Al-Mg/TiC p composite fabricated by the pressureless infiltration method were analyzed using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and transmission electron microscopy (TEM). During the fabrication of composites, reaction products with various morphologies and sizes were formed in the Al matrix as well as in the vicinity of the TiC particles by the interfacial reaction between the Al alloy and the TiC particles. From the EDS and selected-area diffraction pattern (SADP) analysisbe identified to form as interfacial reaction products. Both the size and the amount of the reaction products were increased with increasing fabrication temperature as well as fabrication time. Coarse Al 3 Ti was barely observed in water-quenched composites, while it was observed at all fabrication temperatures (700°C to 1000°C) in furnace-cooled conditions.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Reaction products of Al/TiC composites fabricated by the pressureless infiltration technique

Lee

Sim

Kwon

2005

Metall Mater Trans A

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“…Investigation on squeeze cast Al-Mg-BN-reinforced composites showed the formation of interfacial AlB 2 phase and in situ AlN phase which resulted in significant grain refinement (Lee et al 2002). The interfacial reaction products of the Al/B 4 C p composite fabricated by the pressureless infiltration method were analyzed by Lee et al (2001) using XRD, SEM, EDS, AES, and TEM. From the SADP and CBED analysis, it was identified that AlB 2 , β-AlB 12 (Al 3 B 48 C 2 ), AlB 10 (AlB 24 C 4 ), and Al 3 BC were formed as interfacial reaction products (Fig.…”

Section: Al-compositesmentioning

confidence: 99%

Light Metal Matrix Composites

Jayalakshmi¹,

Gupta

2015

SpringerBriefs in Materials

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Fundamentals of metal matrix composites are overviewed. The various light metal matrix systems (particularly Al and Mg) and the different types of reinforcements used are mentioned. The various composite production methods are described. Strengthening mechanisms that define the enhancement in properties of composites are discussed. The microstructural and mechanical properties of the composites are summarized. In addition, the several disadvantages encountered in MMCs due to ceramic reinforcement addition are understood from interfacial characteristic/properties. Keywords

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“…Moreover, severe interfacial reactions between B4C particles and liquid Al have led to the increase of reaction products during the casting process and consequently harmed the fluidity of the melt [25]. Thus, several non-equilibrium methods, such as powder metallurgy [136], infiltration [144][145][146][147], cryomilling [138,142,148], and the shock-compacted method [137] have been utilized.…”

Section: B4c Reinforcementmentioning

confidence: 99%

Developing Sc and Zr containing Al-B C metal matrix composites for high temperature applications /

Lai¹

2011

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RESUMEDans cette étude, nous nous intéressons principalement au développement de la coulée, et au durcissement structrural des composites à matrice métallique AI-B4C pour des applications à haute temperature. Le scandium et le zirconium ont été introduits dans le système AI-B4C, comme éléments d'alliage, et leurs effets sur la microstrcture, la réponse au vieillissement, les propriétés mécaniques et la stabilité thermique ont été étudiés.Afin de réaliser cette étude, un microscope optique, un microscope électronique à balayage et un microscope électronique à transmission ont été utilisés dans le but d'observer la microstructure de brut de coulée et celle obtenue après vieillissement, d'analyser les réactions interfaciales, la distribution des éléments d'alliage entre l'interface et la matrice ainsi que pour examiner l'évolution des précipités lors de la couleé et le vieillissement.La réponse au vieillissement et le durcissement structural de la matrice ont été suivis par des mesures de dureté 'Vickers'. Les propriétés mécaniques et la stabilité thermique à long terme des composites contenant Se et Zr ont été évaluées en utilisant des essais de dureté Vickers et Rockwell ainsi que des essais de compression.Dans le premier chapitre de cette étude, des plaques de B4C ont été immergées dans l'aluminium liquide contenant Se, Zr et Ti afin d'étudier les réactions interfaciales entre le B4C et l'aluminium liquide. Les effets de Se, Zr et Ti à l'interface en terme d'apports individuels et combinés ont été examinés. Les résultats montrent que les trois éléments réagissent avec B4C et forment des couches interfaciales, qui agissent comme des barrières de diffusion, dans le but de limiter la décomposition du B4C dans l'aluminium liquide. Ainsi, les réactions interfaciales et les produits de réaction dans chaque système ont été identifiés. En combinant le Se, Zr et Ti, une grande quantité de Ti est enrichie à l'interface, qui non seulement offre une protection appropriée au B4C mais aussi une réduction de la consomation de Se et Zr à l'interface.Dans le second chapitre, le scandium et le zirconium ont été introduits dans le composite Al-15vol.% B4C, présaturé par Ti et huit composites à diférents teneurs en Se et Zr ont été préparés par couleé conventionelle. Il a été constaté que le scandium favorise les réactions interfaciales avec B4C qui consomme partiellement le Se. L'ajout de Se procure un durcissement structural considerable dans les conditions de couleé conventionnelle et du pic de veiellissement. Afin d'obtenir un durcissement equivalent de Se dans les alliages binaires, environ le double de la quantité de Se est nécessaire pour les composites AI-B4C. Par contre, aucun produit de réaction majeur de Zr n'a été trouvé aux interfaces. En effet, la majeure partie de Zr se concentre dans la matrice pour le durcissenent structurale. La combinaison de Se et Zr augmente de manière significative le durcissement structural. Deux types de précipités nanométriques, AI3SC et Al3(Sc, Zr), ont été observés dans la 11 microstructu...

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Reaction products of Al–Mg/B4C composite fabricated by pressureless infiltration technique

Cited by 82 publications

References 13 publications

Reaction products of Al/TiC composites fabricated by the pressureless infiltration technique

Reaction products of Al/TiC composites fabricated by the pressureless infiltration technique

Light Metal Matrix Composites

Developing Sc and Zr containing Al-B C metal matrix composites for high temperature applications /

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