On the reaction between aluminium, K2TiF6 and KBF4

El‐Mahallawy, N. A.; Taha, M. A.; Jarfors, Anders E. W.; Fredriksson, Hasse

doi:10.1016/s0925-8388(99)00294-7

Cited by 69 publications

(44 citation statements)

References 15 publications

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“…In order to discuss the effect of K 2 TiF 6 and KBF 4 on the attained microstructures, one has to consider the reactions taking place during the whole manufacturing process, in accordance with the involved phase diagrams [29] and the work of El-Mahallawy [30]):…”

Section: Effect Of Different Wetting Agents On the Microstructure Of mentioning

confidence: 99%

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Effect of Wetting Agent and Carbide Volume Fraction on the Wear Response of Aluminum Matrix Composites Reinforced by WC Nanoparticles and Aluminide Particles

Lekatou¹,

Gkikas²,

Karantzalis³

et al. 2017

Archives of Metallurgy and Materials

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Aluminum matrix composites were prepared by adding submicron sized WC particles into a melt of Al 1050 under mechanical stirring, with the scope to determine: (a) the most appropriate salt flux amongst KBF 4 , K 2 TiF 6 , K 3 AlF 6 and Na 3 AlF 6 for optimum particle wetting and distribution and (b) the maximum carbide volume fraction (CVF) for optimum response to sliding wear. The nature of the wetting agent notably affected particle incorporation, with K 2 TiF 6 providing the greatest particle insertion. A uniform aluminide (in-situ) and WC (ex-situ) particle distribution was attained. Two different sliding wear mechanisms were identified for low CVFs (≤1.5%), and high CVFs (2.0%), depending on the extent of particle agglomeration.

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Section: Effect Of Different Wetting Agents On the Microstructure Of mentioning

confidence: 99%

“…1b). The coarse grain structure is attributed to the limited population of boride precipitates, which may in turn be explained by the slow rate of reaction (4) and limited grain refining efficiency [20,30]. Fig.…”

Section: Effect Of Different Wetting Agents On the Microstructure Of mentioning

confidence: 99%

Effect of Wetting Agent and Carbide Volume Fraction on the Wear Response of Aluminum Matrix Composites Reinforced by WC Nanoparticles and Aluminide Particles

Lekatou¹,

Gkikas²,

Karantzalis³

et al. 2017

Archives of Metallurgy and Materials

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“…[9][10][11]. In the 7055Al-K 2 TiF 6 -KBF 4 system, some chemical reactions took place in the aluminum molten liquid at 1 123 K. The formations of the in situ TiB 2 reinforcements in experiments are described by the following reactions [12] : 3K 2 TiF 6 +13Al→3Al 3 Ti+K 3 AlF 6 +3KAlF 4 (1) 6KBF 4 +9Al→AlB 2 +2KAlF 4 (2)…”

Section: Methodsmentioning

confidence: 99%

Mechanism and kinetic model of in-situ TiB2/7055Al nanocomposites synthesized under high intensity ultrasonic field

Chen

Zhao

et al. 2011

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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In-situ TiB 2 /7055Al nanocomposites are fabricated by in situ melt chemical reaction from 7055Al-K 2 TiF 6 -KBF 4 system under high intensity ultrasonic fi eld, and the mechanism and kinetic model of insitu melt chemical reaction are investigated. X-ray diffraction (XRD) and scanning electron microscope (SEM) analyses indicate that the sizes of in-situ TiB 2 nanoparticles are in the range of 80-120 nm. The results of icewater quenched samples show that the whole process contains four stages, and the overall in-situ reaction time is 10 minutes. The in situ synthesis process is controlled mainly by chemical reaction in earlier stage (former 3 minutes), and by the particulate diffusing in later stage. The mechanism of key reaction between Al 3 Ti and AlB 2 under high intensity ultrasonic in the 7055Al-K 2 TiF 6 -KBF 4 system is the reaction-diffusion-crack-rediffusion. Furthermore, the reactive kinetic models in 7055Al-K 2 TiF 6 -KBF 4 system are established.

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“…They have also carried out rigorous mechanical and wear testing and found that it exhibits superior wear and mechanical properties than many Al MMC and comparable to many of the engineering metals. El-Mahallawy et al [37], reported the development of TiB 2 /Al MMC through casting process and investigated the reactions resulted from both simultaneous and subsequent addition of two different salts viz. K 2 TiF 6 and KBF 4 into the 99.999% pure Al melt at 800 0 and 1000 0 C. Zhang et al [38] reported their investigation on the effect of four types of reinforcing with four different particulates on the Al/TiB 2 MMC's dampening properties.…”

Section: Investigation On Al-tib 2 MMCmentioning

confidence: 99%

Review on experimental study of Nd:YAG laser beam welding, with a focus on aluminium metal matrix composites

Banerjee¹,

Biswal²,

Lohar³

et al. 2016

IJET

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The demand for high performance materials particularly in aviation and automobile industries gradually increases, CO 2 and Nd: YAG lasers are becoming most popular in processing these advanced materials. In this context, one of the most important process is joining by welding. It has been a constant endeavour by researchers to explore various methods and techniques to enhance the process efficiency of autogenous Nd: YAG laser welding of various materials i.e. without any filler materials. In this work, we present a comprehensive review of major research findings for the last decades or so, obtained by researchers about the effect of process parameters on autogenous laser beam welding (LBW) process performance. Main objective of such experimental research was to improve laser weld quality such as tensile strength, weld micro structure, heat affected zone (HAZ), weld penetration etc. In this paper, discussions are also made about different parameter optimisation techniques, design of experiments (DOE), modelling and simulation techniques, adopted by different researchers to achieve optimum weld quality. This review tries to bring out a foresight for direction of further research needed in this field.

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On the reaction between aluminium, K2TiF6 and KBF4

Cited by 69 publications

References 15 publications

Effect of Wetting Agent and Carbide Volume Fraction on the Wear Response of Aluminum Matrix Composites Reinforced by WC Nanoparticles and Aluminide Particles

Effect of Wetting Agent and Carbide Volume Fraction on the Wear Response of Aluminum Matrix Composites Reinforced by WC Nanoparticles and Aluminide Particles

Mechanism and kinetic model of in-situ TiB2/7055Al nanocomposites synthesized under high intensity ultrasonic field

Review on experimental study of Nd:YAG laser beam welding, with a focus on aluminium metal matrix composites

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