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"Effect of high temperature heat treatment on microstructure and proper" by Yangchuan Cai, Mengdie Shan et al.

Here, the heat treatment for FeCoCrNiAl high-entropy alloy (HEA) laser cladding (LC) layer was given at a temperature which is higher than that of the first phase transition. The effects of heat treatment on the phase transition, microstructure and mechanical properties of the LC-ed FeCoCrNiAl were studied. Meanwhile, the LC-ed sample was compared with the casting specimen. The results showed that the cladding layer had lower activation energy of phase transformation, and it had higher proportion of Fe element because of the dilution of the matrix metal, which promoted the formation of face-centered cubic (FCC) phase. Then more FCC phase structures precipitated in the cladding layer after heat treatment. However, the formation of FCC phase did not change the texture characteristics of the cladding layer. The differences in physical properties, slip system, Burgers vector and dislocation types between the two phases, as well as the serious atomic disarrangement at the two-phase interfac ....

Bcc Phase , Bcc Phase , Ecocrnial Hea Cladding Layer , Igh Temperature Heat Treatment , Laser Cladding , Phase Interface ,

"Water-in-Water Emulsions, Ultralow Interfacial Tension, and Biolubrica" by Yitong Wang, Jin Yuan et al.

A water-in-water (W/W) emulsion consists of droplets formed by the spontaneous liquid–liquid separation of two immiscible aqueous phases. The inherent properties of the W/W interfaces, low or ultralow interfacial tension (γW/W = 1–1000 μN/m) and a large thickness of several nanometers, beget the poor inherent stability of emulsions. Herein, we report a nanofibril emulsifier having Schiff base reactivity to generate a W/W emulsion. The W/W emulsion has superior stability (stable > 6 months) because collagen nanofibrils, acting as a stabilizer of W/W emulsions, can simultaneously satisfy the requirements of size and overall coverage ratio of the phase interfaces. W/W emulsions having γW/W ∼10 μN/m were used as synthetic synovial fluids, showing superior lubrication performance with a coefficient of friction in the range of 0.003–0.011, which has been demonstrated to be suitable for joint lubrication. An intraarticular injection assessment further confirmed this protective ....

Phase Interface , Ltralow Interfacial Tension , Ater In Water Emulsion ,

"Atomically dispersed Ni induced by ultrahigh N-doped carbon enables st" by Keming Song, Jiefei Liu et al.

Building phase interface with enough solid-phase contact is of great importance for improving chemical reaction kinetics and depth. High dispersion of electrode materials, especially at the atomic-level, are known for high interface contact, yet their potential application in batteries is restricted due to low loading. Herein, the atomically dispersed metal Ni (Ni in Ni–N–C is 54.9 wt %) with high loading was achieved by ultrahigh N-doping carbon (N/N–C:29.5 wt %) during the discharging process of nickel sulfide, leading to good reversibility and high-capacity maintenance owing to ultrahigh phase contact during long cycling for sodium-ion batteries. It delivers a stable cycling life (0.061% capacity decay per cycle) compared with the poor cyclability (0.418%) for the Ni agglomeration electrode with lower N-doping. The assembled pouch cells achieve robust stability (92.1% after 50 cycles). DFT calculations reveal that ultrahigh N-doping and electrochemically formed Na2S can provid ....

Atomic Level Ni , Conversion Reaction , Dft Calculations , Igh Capacity Anode , Nickel Sulfide , Phase Interface , Pouch Cell , Dg7 Affordable And Clean Energy , Sodium Ion Batteries , Ltrahighn Doping ,