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"Insights of nanostructure and nanomechanical properties of the tribofi" by Tuong Ly Kiet Dao, Anh Kiet Tieu et al.

This study successfully synthesizes CoAl-hexametaphosphate layered double hydroxide (HMP-LDH) via anion exchange. The application of HMP-LDH leads to substantial wear and friction reduction of 88% and 25%, respectively, outperforming the PAO-4 base oil. In-depth characterizations of tribofilms formed on wear scars and tracks were conducted using various techniques, including Raman, X-ray photoelectron spectroscopy, scanning transmission electron microscopy - energy dispersive X-ray spectroscopy, and cryo-electron energy loss spectroscopy. It was found that the predominant composition of the tribofilm consists of mixed oxide and phosphate species. Notably, metallic cobalt is observed near the tribofilm-steel interface. Nanoindentation and nanoscratch were performed on the HMP tribofilm. The relationship between the nanostructure and nanomechanical properties and their influence on friction and wear have been revealed. ....

Layered Double Hydroxide ,

"Excellent tribological performance at elevated temperatures and associ" by Tri Dinh Vo, Guanyu Deng et al.

A high entropy alloy based self-lubricating composite with good mechanical and tribological properties was developed, using AlCoCrFeNi as matrix and MoS2 as lubricant. In addition to the well dispersed MoS2 particles, the novel composite reveals the presence of unique phases, including those rich in (Cr,Fe,Co), (Cr,Fe), (Al,Ni), Cr (σ-phase), and (Cr,S)-enriched phases. It shows excellent anti-friction and anti-wear capacities from RT to 900 °C. Friction coefficients of the composite are less than all those previously reported AlCoCrFeNi and AlCoCrFeNi-based composites under dry air wear conditions. This improvement can be correlated to the exceptional lubricating properties of MoS2, and the unique phases developed within the composite. Its excellent tribological performance is owing to MoS2 and fine wear debris at low and medium temperatures, while continuous and hard glaze layers at high temperatures. Main wear mechanisms change from abrasion and plastic deformation to oxidation an ....

High Entropy Alloys Heas , Elf Lubricating Composite , Park Plasma Sintering Sps ,

Automated In-Situ Nanoindentation with Hysitron PI 89 Auto SEM : Quote, RFQ, Price and Buy

Achieve high-throughput co-localized imaging and in-situ nanoindentation with Bruker’s Hysitron PI 89 Auto SEM. ....

Electron Backscatter Diffraction Energy Dispersive Spectroscopy , Electron Backscatter , Energy Dispersive Spectroscopy , Scan Auto , Bruker Nano Surfaces , Laser Clad , Triboscan Auto ,

Nanoindentation Measurements of Materials

This article explores the importance of Nanoindentation Testing to determine the micromechanical properties of materials. ....

Nguyenq Chinh , Maria Osipova , Anthonyc Fischer Cripps , Atomic Force Microscope , Semilab Semiconductor Physics Laboratory , Semilab Semiconductor Physics Laboratoryoct , Image Credit , Semilab Semiconductor Physics , Cube Corner , Depth Sensing Indentation Method , Third Edition , Nanoindentation Testing , Icromechanical Properties ,

"Tribochemical insights into the carbon film formation induced by metal" by Tuong Ly Kiet Dao, Anh Kiet Tieu et al.

Layered double hydroxides (LDHs) have demonstrated excellent tribological performance in various studies. However, there remains a fundamental knowledge gap concerning the chemical composition of tribofilms across the cross-section. In this study, we seek to elucidate this question by tribologically testing various binary LDHs. It was found that five out of eight LDHs, denoted as CoAl-, CoFe-, MgAl-, NiFe-, and ZnAl-LDHs could induce hierarchical protective tribofilms due to the formation of rigid oxide layers and in situ carbon-based films. The five tribofilms helped to reduce wear loss and friction by approximately 90% and 20%, respectively. Remarkably, the Co-based tribofilms showed the best antiwear performance because of the thick carbon tribofilm formation and the strong bonding at the metallic/tribo-oxide interfaces. The formation mechanisms of the carbon tribofilm and its characteristic nature were evaluated and revealed by scanning transmission electron microscopy and electron ....

Layered Double Hydroxide ,