Grain boundary wetting of different types of grain boundaries in the Cu–Ag system

Mazilkin, I. A.; Tsoy, Kristina; Страумал, А. Б.; Rodin, A. O.; Baretzky, B.

doi:10.1016/j.matlet.2020.127730

Cited by 40 publications

(4 citation statements)

References 10 publications

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“…The difference to the fraction of covered GBs between S U sample and S K sample confirms the existence of the solid phase GB wetting transition in the Al-Ti-C grain refiner [51] . Similar phenomenon of GBs completely and/or incompletely covered with layers of a second solid phase have been observed also in Al alloys, Cu alloys and Ti alloys et al [52] , [53] , [54] , [55] . The microstructure after ultrasonic treatment reveals significant difference from the initial state.…”

Section: Resultssupporting

confidence: 78%

Wetting of aluminium and carbon interface during preparation of Al-Ti-C grain refiner under ultrasonic field

Zhao

Ning

et al. 2021

Ultrasonics Sonochemistry

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Highlights Providing a new method for the preparation of Al-Ti-C grain refiner. The contact angle θ of aluminum-carbon interface is reduced under ultrasonic field. TiC particles are detached from the interface driven by sound pressure, which results that the wetting interface is updated in real time. The wetting and spreading of the aluminum melt on the graphite surface under ultrasonic field are simulated.

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Section: Resultssupporting

confidence: 78%

Wetting of aluminium and carbon interface during preparation of Al-Ti-C grain refiner under ultrasonic field

Zhao

Ning

et al. 2021

Ultrasonics Sonochemistry

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“…The Cr/Fe ratios in M 23 (C, B) 6 and M 7 C 3 from thermodynamics calculations are close to those detected by EDS (Table 1), indicating that the heat treatment has brought the alloy close to its equilibrium state. It is worth noting that in some cases, carbides are surrounded by white regions, e.g., those shown in Figure 4B,K, which could be related to the phenomenon of wetting at grain boundaries or interfaces 29,30 . Such a phenomenon may influence the transformation of M 7 C 3 to M 23 C 6 during the formation of the core‐shell structured carbide.…”

Section: Resultsmentioning

confidence: 97%

Promoting in situ formation of core‐shell structured carbides in high‐Cr cast irons by boron addition

Tang

Tang³

et al. 2021

J Am Ceram Soc

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M7C3 carbide is an important reinforcing phase in high‐Cr cast irons, ferrous alloys, metal‐matrix composites, and hardfacing overlays. However, the mismatch at the carbide/matrix interface due to the differences in structure and mechanical strength between the carbide and metallic matrix may lower the resistance of the material to mechanical attack, such as wear, corresponding to increased risk of interfacial failure or the role of the interfacial mismatch as a stress raiser for crack initiation. Recent studies on high‐Cr cast irons (HCCI; Fe‐45%Cr‐%C series) show that core(M7C3)‐shell(M23C6) structured carbides (CSSCs) help minimize the misfit stress at the interface between carbide and matrix, thus enhancing their resistance to wear. However, such core‐shell structured carbide does not always form. It is of importance to understand the mechanism responsible for the formation of CSSC for maximized benefits. In this study, we conducted thermodynamic analysis to investigate the conditions for in situ forming CSSCs in HCCIs and determine the probability of generating CSSCs through alloying elements. Both thermodynamic analysis and first‐principles calculations demonstrate that the core‐shell structured carbide can be in situ formed in HCCIs by alloying with elements such as boron, which increases the stability of M23C6 with lowered energy. Relevant experiments were performed to verify the theoretical analysis and prediction.

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“…2a almost fully surrounds the grains of α-Mg phase appearing dark-grey, and separates them from each other. Such behavior is intimately connected with the complete and incomplete wetting of grain boundaries by the melt or second phase [3,32]. With La addition, more LaMg 12 is precipitated.…”

Section: Resultsmentioning

confidence: 99%

Thermal Conductivity of As-Cast and Annealed Mg-RE Binary Alloys

Guo

Liu

Huang

et al. 2021

Metals

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Thermal conductivity and phase identification of Mg-RE (Rare-Earth) alloy (Mg-La, Mg-Ce, Mg-Nd, Mg-Sm) in both as-cast and annealed states were investigated. The thermal conductivity was measured by the laser flash method in the composition range of 4 wt.% to 12 wt.% RE and the temperature range of 298 K to 673 K. Results demonstrated that homogenization treatment can increase its thermal conductivity. The thermal conductivity increases with the increasing temperature in two states, which is inconsistent with the pure magnesium, and the thermal conductivity of Mg-RE alloys decreases with the alloy additions. Compared with the atomic radius, valence, and intermetallic compounds, the solid solubility of the above four RE elements in α-Mg plays a vital role in the thermal conductivity of Mg-RE binary alloy. The reduction of thermal conductivity caused by the addition of Nd and Sm, which show observable solid solubility in α-Mg, is significantly greater than the addition of La and Ce with negligible solid solubility in α-Mg.

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Grain boundary wetting of different types of grain boundaries in the Cu–Ag system

Cited by 40 publications

References 10 publications

Wetting of aluminium and carbon interface during preparation of Al-Ti-C grain refiner under ultrasonic field

Wetting of aluminium and carbon interface during preparation of Al-Ti-C grain refiner under ultrasonic field

Promoting in situ formation of core‐shell structured carbides in high‐Cr cast irons by boron addition

Thermal Conductivity of As-Cast and Annealed Mg-RE Binary Alloys

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