Reactive synthesis of hexagonal Ti5P3.16 crystals and their heterogenous nucleating mechanism on primary Si

Nie, Jinfeng; Zhao, Yongli; Li, Yusheng; Wang, Fang; Yang, Huabing; Hu, Kaiqi; Liu, Guiliang; Liu, Xiangfa

doi:10.1016/j.jallcom.2018.09.038

Cited by 14 publications

(6 citation statements)

References 42 publications

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“…It can be concluded that the rod-like phase is eutectic Si and the needle-like phase is AlSiFe phase. As it is known, the AlP phase tends to hydrolyze during the sample preparation process [15] . As seen in the EDS images in Fig.…”

Section: Microstructure Of Master Alloysmentioning

confidence: 99%

“…P-based master alloys are efficient grain refiners for the primary silicon, and various P-based master alloys have been developed, such as Al-P, Al-Si-P, Al-Fe-P, Si-Mn-P, etc. [2,15] , which each have a different refinement process and effectiveness. However, studies concerning their different effects on nucleation abilities of primary silicon are rarely found.…”

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confidence: 99%

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Grain refinement of primary silicon in hypereutectic Al-Si alloys by different P-containing compounds

Njuguna

Tan

et al. 2021

China Foundry

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A l u m i n u m-b a s e d a l l o y s a r e t h e m o s t w i d e l y used engineering materials in the automotive and aeronautical industries due to their high strength-toweight ratio and high wear resistance [1-5]. Hypereutectic Al-Si alloys are particularly preferred as they exhibit a low coefficient of thermal expansion and a hightemperature strength [2-11]. These properties are attributed to the presence of the primary silicon phase in the aluminum matrix [7]. The castability of the alloy is also enhanced by the addition of silicon in the alloying process, by improving the melt flow [12]. However, the conventional casting procedures produce coarse grains of the primary silicon. These coarse grains are prone to premature crack initiation and fracture when subjected to tension loading [3,5,6,9] , which decrease the mechanical properties of the alloy [1]. Many methods are used in the refinement and modification of the primary silicon phase to achieve optimum morphology for improving the mechanical

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Section: Microstructure Of Master Alloysmentioning

confidence: 99%

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confidence: 99%

Grain refinement of primary silicon in hypereutectic Al-Si alloys by different P-containing compounds

Njuguna

Tan

et al. 2021

China Foundry

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“…The size and shape of primary Si have a large influence on the final properties (both mechanical and wear properties) of hypereutectic Al-Si alloys 3,4 . Therefore, it is necessary to conduct modification treatment to refine and homogenize the primary Si phases through melt controlled cooling technology for realizing the application of this alloy [5][6][7] . Furthermore, hypereutectic alloys have a wide temperature range in which the Si phase and liquid phase can coexist, and this can easily lead to gas and shrinkage porosity during squeeze casting or die-casting 8 .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Microstructural Characteristics of High-Si Al Alloy Cylindrical Samples Produced by Rheological Squeeze Casting with Bottom-Up Filling and Flow State Analysis of the Alloy Semi-Solid Slurries

Xiao

et al. 2020

Mat. Res.

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The microstructures of high-Si Al alloy cylindrical simples produced by rheological squeeze-casting with bottom-up filling were investigated. The effect of process parameters on the distribution of hard phases (primary Si and Fe-rich phase) was evaluated, and flow characteristics of semi-solid slurry of high-Si Al alloy were investigated. Differences in volume fractions (VFs) of hard phases between the middle and upper layers of cylindrical samples decreased as the squeezing speed increased. Moreover, the flow state of the semi-solid alloy slurry transitioned from laminar to turbulent flow as the squeezing speed was increased. Movement of gases throughout the semi-solid alloy slurry filling process was analysed under different process parameters. The results provide insights for improving rheological casting of high-Si Al alloy and other Al matrix composites.

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“…The renement of primary Si in hypereutectic Al-Si alloys can be achieved by various methods, such as Al-P, Al-Fe-P and the Al-Ti-P-C master alloy, rare element and ultrasonic treatment, and electromagnetic stirring. [5][6][7][8][9][10][11][12][13][14] Although primary Si can be rened by traditional processes, many methods are either complex and cannot be used on a large scale, or they reduce the TC of the Al-Si alloy considerably.…”

Section: Introductionmentioning

confidence: 99%

Enhanced thermal conductivity and tensile strength of Al–17Si–3.5Cu with SiC-nanoparticle addition

Jiang

2019

RSC Adv.

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Reactive synthesis of hexagonal Ti5P3.16 crystals and their heterogenous nucleating mechanism on primary Si

Cited by 14 publications

References 42 publications

Grain refinement of primary silicon in hypereutectic Al-Si alloys by different P-containing compounds

Grain refinement of primary silicon in hypereutectic Al-Si alloys by different P-containing compounds

Evaluation of Microstructural Characteristics of High-Si Al Alloy Cylindrical Samples Produced by Rheological Squeeze Casting with Bottom-Up Filling and Flow State Analysis of the Alloy Semi-Solid Slurries

Enhanced thermal conductivity and tensile strength of Al–17Si–3.5Cu with SiC-nanoparticle addition

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