Recent advances on antimicrobial wound dressing: A review.

Functional properties and promising applications of high entropy alloys

Formation of a self-lubricating layer by oxidation and solid-state amorphization of nano-lamellar microstructures during dry sliding wear tests

On the enhanced wear resistance of CoCrFeMnNi high entropy alloy at intermediate temperature

Surface nanocrystallization and gradient structure developed in the bulk TC4 alloy processed by shot peening

In this study, high-entropy alloy films, namely, AlCrTaTiZr/AlCrTaTiZr-N, were deposited on the n-type (100) silicon substrate. Then, a copper film was deposited on the high-entropy alloy films. The diffusion barrier performance of AlCrTaTiZr/AlCrTaTiZr-N for Cu/Si connect system was investigated after thermal annealing for an hour at 600 °C, 700 °C, 800 °C, and 900 °C. There were no Cu-Si intermetallic compounds generated in the Cu/AlCrTaTiZr/AlCrTaTiZr-N/Si film stacks after annealing even at 900 °C through transmission electron microscopy (TEM) and atomic probe tomography (APT) analysis. The results indicated that AlCrTaTiZr/AlCrTaTiZr-N alloy films can prevent copper diffusion at 900 °C. The reason was investigated in this work. The amorphous structure of the AlCrTaTiZr layer has lower driving force to form intermetallic compounds; the lattice mismatch between the AlCrTaTiZr and AlCrTaTiZ-rN layers increased the diffusion distance of the Cu atoms and the difficulty of the Cu atom diffusion to the Si substrate.

https://www.mdpi.com/1099-4300/22/2/234/pdf

Diffusion Barrier Performance of AlCrTaTiZr/AlCrTaTiZr-N High-Entropy Alloy Films for Cu/Si Connect System.

The effect of single phase boride layer of DC53 steel disk on subsurface structure evolvement in the dry sliding friction-induced surface layer of 0.45 mass% C steel pin was investigated. Microstructure and microhardness of subsurface layers of 0.45 mass% C steel pin against unboronized and boronized DC53 steel discs after dry sliding friction test were studied by means of OM, SEM, TEM and microhardness tester. Results showed that boride layer significantly affected microstructure evolvement in worn surface layer of 0.45 mass% C steel and the three layers including substrate layer, plastic deformation layer and unpeeling delamination layer were formed beneath the worn surface of pin against the boronized disc, while only two layers except unpeeling delamination layer were formed against the unboronized disc. The microhardness of subsurface layer of 0.45 mass% C steel pin decreased as the depth beneath worn surface increased without regard to the unpeeling delamination layer in BD tribopair. The ferrite grains in the worn surface layer of pin for BD tribopair were ultra-fined, of which reason was considered to be the result of joint action of frictional heat and shear deformation.

Effect of boronizing on the dry sliding wear behavior of DC53/0.45 mass% C steel pairs

T10 steel slid against 20CrMnTi steel on a pin-on-disc wear test rig. Optical Microscope (OM), scanning electron microscope (SEM), and High Resolution Transmission Electron Microscope (HRTEM) methods were used to analyze the microstructures in the worn surface layers. The microstructures in the worn surface layers of pins and discs were all severely plastically deformed. Furthermore, the ultrafine and even nanoferrite structure (10 nm to 100 nm) was observed when the normal load reached 60 N. The mechanism of forming nanocrystalline structure in the sliding friction induced deformation layer (SFIDL) was elucidated as the result of the simultaneous and recursive actions of (i) severe shear deformation and (ii) friction heat on the contact surface.

/pdf/formation-of-nanocrystallized-structure-in-worn-surface-39s9vd13g7.pdf

Formation of nanocrystallized structure in worn surface layer of T10 steel against 20CrMnTi steel during dry rubbing

Atomic diffusion of gradient ultrafine structured surface layer produced by T10 steel rubbing against 20CrMnTi steel

Cr atom diffusion in tribolayer T10 steel induced by dry sliding against 20CrMnTi steel

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