The Excellent Mechanical Performance of Polymer-Coated Ceramsite Particles for Efficient Fracturing: An Explanation from a Surface, Tribological Perspective.

Hydraulic fracturing using micro-particles is an effective technology in the petroleum industry since the particles facilitate crack propagation of the shale layer, creating pathways for oil and gas. A new kind of polymer-coated ceramsite particles (PCP) was generated. The friction and wear properties of the particles under different loads and speeds were also studied.

FBG-Based Sensitivity Structure Based on Flexure Hinge and Its Application for Pipeline Pressure Detection.

With the widespread application of pipelines in engineering, more and more accidents occur because of pipeline leakage. Therefore, it is particularly important to continuously monitor the pipeline pressure. In this study, a non-intrusive and high-sensitivity structure based on FBG (Fiber Bragg grating) sensor is proposed.

Recent development in friction of 2D materials: from mechanisms to applications.

Two-dimensional (2D) materials with a layered structure are excellent candidates in the field of lubrication due to their unique physical and chemical properties, including weak interlayer interaction and large specific surface area. For the last few decades, graphene has received lots of attention due to its excellent properties. Besides graphene, various new 2D materials (including MoS, WS, WSe, NbSe, NbTe, ReS, TaSand h-BN etc.

Nanomechanical Properties of TiC Mxene.

MXene is a new type of two-dimensional (2D) material that finds wide applications; however, its adhesion and tribological properties have not yet been fully revealed. Here, the chemical structure of MXene was revealed by X-ray diffraction, and the adhesion and friction behaviors of MXene were studied with atomic force microscopy (AFM) Nanoman technology. It was found in AFM tests that MXene exhibited enhanced adhesion and friction at higher pressure but exhibited reduced adhesion and friction at elevated temperature, while the sliding speed and delay time of the AFM probe have negligible effects on the friction.

A Strategy to Synthesize Multilayer Graphene in Arc-Discharge Plasma in a Semi-Opened Environment.

Graphene, as the earliest discovered two-dimensional (2D) material, possesses excellently physical and chemical properties. Vast synthetic strategies, including chemical vapor deposition, mechanical exfoliation, and chemical reduction, are proposed. In this paper, a method to synthesize multilayer graphene in a semi-opened environment is presented by introducing arc-discharge plasma technology.

Mechanical and Unlubricated Sliding Wear Properties of Nitrile Rubber Reinforced with Micro Glass Flake.

In this study, the filled nitrile rubber (NBR) was prepared with micro glass flake (GF). The tribological behaviors of filled NBR were tested by a ball-on-disk tribometer. Material properties such as glass transition temperature (), fracture energy, tensile strength and dispersity of GF filler were also investigated.