For the first time, bowl-like hollow carbon spheres (BHCSs) have been designed and fabricated by combination of hydrothermal carbonization soft templating. The obtained BHCSs exhibit well-defined shapes with size ranging from 1 to 2 μm. As electrodes electrochemical double layer capacitors they showed good performance.

Abstract Al-Cu-Mg-Ag alloys are widely used in aerospace due to their excellent heat resistance, high specific strength, and good machinability. In solidification, the compositional distribution segregation of alloy play an important role its properties. Therefore, this paper, solidification phase field model was established by using method simulate after solidification. The experiments show that solutes expelled during advancement interface liquid phase, content each element is higher...

Abstract Al-Cu-Mg-Ag alloys are widely used in aerospace field due to their excellent heat resistance, high specific strength and good machinability. In order obtain performance, the control of its solidification structure is very important, so it necessary numerically simulate then structure. this paper, phase model was established by method study microstructure evolution during solidification. The process Al-Cu-Mg-Ag-Si alloy simulated verified experiments. results show that grains grow...

The objective of the present work was to study effect application minimum quantity lubrication (MQL) in high-speed helical milling Ti-6Al-4V compared with dry and flood coolant (wet) condition. single factor experiment relationship between cutting force, hole surface roughness parameters under various coolant-lubricant conditions were implemented. Tool life cooling fixed moderate have also been studied. Uniform flank wear, micro-chipping, thermal cracking flaking dominant tool failure modes...

Abstract This study introduces a simple and cost-effective approach for modifying large organic surfaces, facilitating robust adhesion between Au films polymethyl methacrylate (PMMA) while retaining transparency to visible light effectively shielding against electromagnetic interference (EMI). The proposed surface modification method employs cheap low-power conventional UV lamp illuminate surfaces in an open environment, rending it convenient applicable ranging from small massive,...

An iron based alloy powder (Fe–2.0Ni–1.0Cu–0.8Cr–0.5C) was used as raw material to prepare high density by warm die velocity compaction (WHVC). The effects of on (HVC) densification behaviour, variations stress waves and the resulting mechanical properties were studied. results show that, under condition at 100°C, HVC behaviour changes green improves. Compared with compacts prepared HVC, WHVC is 0.09–0.27 g cm− 3 higher impact range 6.2–8.7 m s− 1. reaches 7.62 7.9 sintered 1150°C in H2...

This study investigated the hot deformation behavior of Ti-4Al-1Sn-2Zr-5Mo-8V-2.5Cr alloy through isothermal compression tests at temperatures from 780 to 930 °C with strain rates ranging 0.001 1 s−1. The flow stress decreases a decreased rate and an increased temperature. A constitutive equation was established for this dependence activation energy on temperature is discussed. We further proposed processing map using dynamic materials model. On various domains stability instability can be...

This paper aims to establish the wear mechanisms of tungsten carbide (WC) tools coated with TiAlN and diamond respectively when helical milling Ti-6Al-4V. During experiments, cutting forces were measured using a dynamometer. In addition, scanning electron microscope (SEM), digital Energy-dispersive X-ray (EDX) periodically used measure progression tool surface analyze mechanisms. analysis force two types coating tools, process TiAlN-coated is more stable it lower. showed better performance...

In the flexible manufacturing system, a reasonable production scheduling is crucial in shortening processing completion time and improving equipment utilization. Traditional manual cannot effectively solve complex workshop problems provide solution that meets requirements short period of time, which can lead to decrease efficiency. Aiming at job shop problem, genetic algorithm used find optimal this study, taking number overdue jobs, total comprehensive load rate maximum machine tool as...

In this study, a Ti composite reinforced with 5 vol. % (TiBw + TiCp) was fabricated by an in situ casting route. Open die forging (α β) phase region conducted on the casting. The microstructures of as-forged pancake are inhomogeneous terms matrix microstructure and distribution reinforcements. grains gradually refined from periphery to centre pancake. reinforcements TiBw TiCp tend be uniformly distributed region. It is suggested that difference can mainly ascribed temperature variation...

Impurity control remains to be a challenge titanium metal injection moulding (Ti-MIM). Much attention has been paid polyethylene glycol (PEG) based binder systems due the eco-friendly and water-soluble feature of PEG. In this study, new easy-to-debind PEG/polypropylene carbonate (PPC)-based system (76% PEG+17% PPC+3% polymethyl methacrylate (PMMA)+2% stearic acid (SA)+2% polyvinyl acetate (PVAc)) was developed. The rheological properties feedstocks prepared with in different proportions were...

In situ crystallized Cs 4 PbBr 6 @KBr color conversion films have been obtained, showing an average pixel diameter of 16.7 μm, impressive PLQY 94%, and excellent stability against thermal light irradiation.

The development of high-strength and heat-resistant aluminum alloy components through additive manufacturing has long been a primary objective in the aerospace industry. However, formability alloys, particularly those containing high element content, presents significant challenges implementation laser powder bed fusion as technique. In this study, we demonstrate that combination composition design capitalizing on varying cooling rates within different regions LPBF can enable unparalleled...

Digital writing is making breakthroughs in language instruction. With digital software online learning labs, this paper elaborates an empirical study introducing the implementation process of cooperative network environment. Adopting qualitative and quantitative approaches, research results show that enhances student autonomy control over achieves better effects improving students' English skills. Moreover, also shed some lights on pedagogical implications, illustrating benefits brings to...