Study on process parameter optimization for electron beam melting additive manufacturing by Wang, Chengcheng

“…Electron beam melting additive manufacturing (EBM-AM), also known as selective electron beam melting (SEBM), is a mainstream metal additive manufacturing (AM) technique that employs an electron beam to process metallic powder feedstocks in vacuum environment (~ 10-4 - 10-5 mbar) at elevated temperatures (~ 500 - 1100 °C). …”
Get full text

Wireless measurement of elastic and plastic deformation by a metamaterial-based sensor by Ozbey, Burak, Demir, Hilmi Volkan, Kurc, Ozgur, Erturk, Vakur, Altintas, Ayhan

“…The NSRR probe is fixed on a standard steel reinforcing bar (rebar), and its frequency response is monitored telemetrically by a network analyzer connected to the antenna across the whole stress-strain curve. …”
Get full text
Get full text

Membranes with ZIF-8 regulated MXene nanosheet stacks for efficient molecular sieving by Li, Jian, Li, Lei, Li, Xin, Dong, Liangliang, Wang, Zhenyu, Shen, Jiangnan, Van der Bruggen, Bart

“…Compared with the pristine thin film composite membrane, the optimal membrane exhibited an excellent pure water permeability up to 40.8 L m−2 h−1 bar−1 while maintaining high rejections (>99.0 %) for Congo red, reactive blue 19, xylene brilliant cyaninG250 and methyl blue, respectively. …”
Get full text

Mechanical properties and cracking behaviour of marble and moulded gypsum under high strain rates by Zou, Chunjiang

“…The mechanical properties of both intact and non-intact specimens including the compressive strength, the tensile strength, the elastic modulus, and the failure strain are tested under different strain rates by using a servo compression machine and a split Hopkinson pressure bar (SHPB) system. Experimental results reveal that these mechanical properties all show strain rate-dependence to different degrees. …”
Get full text

Synthesis and performance analysis of a polysulfone braid-supported hollow fiber membrane for natural gas purification by Imtiaz, Aniqa, Kamaludin, Roziana, Othman, Mohd. Hafiz Dzarfan, Jilani, Asim, Khan, Imran Ullah, Muhammad Ayub, Muhammad Ayub, Samuel, Ojo, Iftikhar, Musawira

“…To assess the performance, gas separation tests were conducted using pure gases at 3 bar. Notably, the membrane sample with 21 wt% PSF and the 3rd coating layer (21_3 PSF) exhibited the most promising gas separation performance among all the samples selected to carry out the separation performance test, achieving a CO2/CH4 selectivity of 1.83. …”

High-throughput quantification of quasistatic, dynamic and spall strength of materials across 10 orders of strain rates by Eswarappa Prameela, Suhas, Walker, Christopher C, DiMarco, Christopher S, Mallick, Debjoy D, Sun, Xingsheng, Hernandez, Stephanie, Sasaki, Taisuke, Wilkerson, Justin W, Ramesh, KT, Pharr, George M, Weihs, Timothy P

“…Traditionally, high strain rates and shock stresses are achieved using cumbersome and expensive methods such as the Kolsky bar or large spall experiments. These methods are low throughput and do not facilitate high-fidelity microstructure–property linkages. …”
Get full text

PTFE-assisted immobilization of Pluronic F127 in PVDF hollow fiber membranes with enhanced hydrophilicity through nonsolvent-thermally induced phase separation method by Zhao, Jie, Chong, Jeng Yi, Shi, Lei, Wang, Rong

“…The resultant membranes possess a pure water permeability (PWP) of 869 ± 39 L m−2h−1bar−1 with a mean pore size of 0.09 ± 0.01 μm and an outstanding tensile strength of 7.0 ± 0.3 MPa, suggesting the potential of N-TIPS method for tuning the membrane pore structure and hydrophilicity by using multifunctional additives.…”
Get full text

Robust polyamide-PTFE hollow fibre membranes for harsh organic solvent nanofiltration by Francis, Verona Nithya, Chong, Jeng Yi, Yang, Guoying, Che, Lei, Wang, Rong

“…The synthesized membranes showed high acetonitrile (ACN) and DMF permeabilities of 7.94 and 3.70 lm−2h−1bar−1, respectively, with acid fuchsin (585 Da) rejections of > 90 %. …”
Get full text

Low-temperature specific heat capacity of water-ammonia mixtures down to the eutectic by Chua, Bing Hong, Gloesener, Elodie, Choukroun, Mathieu, Vu, Tuan H., Melwani Daswani, Mohit, Journaux, Baptiste, Styczinski, Marshall J., Vance, Steven D.

“…In support of developing new equations of state, we conducted 1 bar specific heat capacity measurements (Cp) using a differential scanning calorimeter (DSC) at low temperatures (184-314 K) and low mass fractions of ammonia (5.2-26.9 wt %) to provide novel data in the parameter space most relevant for planetary studies. …”
Get full text

Device and material investigations of GaN enhancement-mode transistors for Venus and harsh environments by Xie, Qingyun, Niroula, John, Rajput, Nitul S., Yuan, Mengyang, Luo, Shisong, Fu, Kai, Isamotu, Mohamed Fadil, Palash, Rafid Hassan, Sikder, Bejoy, Eisner, Savannah R., Surdi, Harshad, Belanger, Aidan J., Darmawi-Iskandar, Patrick K., Aksamija, Zlatan, Nemanich, Robert J., Goodnick, Stephen M., Senesky, Debbie G., Hunter, Gary W., Chowdhury, Nadim, Zhao, Yuji, Palacios, Tomás

“…The GaN transistor in this work was subjected to prolonged exposure (11 days) in a simulated Venus environment (460 °C, 94 bar, complete chemical environment including CO2/N2/SO2). …”
Get full text

Ultramafic Alteration and the Cooling of Earth and Mars by Murray, Joshua

“…I show that the same high-surface-area clay minerals which bury organic carbon on Earth are prevalent enough on Mars to store the bulk of its initial 1-4 bar atmosphere as adsorbed methane. I postulate that this methane was formed abiotically during hydrothermal alteration of ultramafic rocks, a process which is observed in ultramafic systems on Earth. …”
Get full text

Heteroatom-doped microporous carbon nanosheets derived from pentaerythritol-melamine for supercapacitors and CO₂ capture by Hu, Xiaochun, Luo, Yuqing, Wu, Xianyue, Niu, Jiabin, Tan, Mingwu, Sun, Zhiqiang, Liu, Wen

“…When used for CO2 capture, the HMCN synthesized by the pyrolysis of a 3:2 mixture of MEL and PER at 900 °C (3/2-HMCNs-900) affords a CO2 uptake of 5.35 mmol g−1 at 273 K and 1 bar CO2 partial pressure. Density functional theory calculations suggest that the high CO2 uptake performance of the HMCNs is associated with the chemical modification of the surface, as a result of N- and O- co-doping. …”
Get full text

Fabrication of organic solvent nanofiltration membranes with graphene oxide - enhanced covalent organic framework via interfacial polymerization by Oor, Jia Zheng, Ong, Chi Siang, Tan, Yong Zen, Chew, Jia Wei

“…The PES-COF-GO membranes exhibited optimal solvent permeance and separation efficiency at an intermediate 0.8wt% GO, which gave the highest water permeance of 16.2L/m2 h bar and a molecular weight cut-off (MWCO) of around 325 gmol-1. …”
Get full text

In-situ rapid construction of aliphatic amine combined polyamide seawater reverse osmosis membrane for efficient boron removal by Li, Can, Lai, Gwo Sung, Zhao, Yali, Wang, Rong

“…The permeability coefficient of boron decreased from 4.8 to 0.9 L m−2 h−1, and the boron rejection increased from 80.7 to 90.5% under the modification conditions with the optimal type and concentration of amines, while displaying a NaCl rejection of 99.8% and an acceptable water permeability of 0.55 L m−2 h−1 bar−1. Meanwhile, the alteration of membrane chemical compositions and structure properties was kept to a minimum. …”
Get full text

Engineering nano-nodular pattern on the substrate surface by tuning phase inversion to construct ultrapermselective ion-separation nanofiltration membrane by Zhao, Yali, Li, Can, Liao, Yuan, Yin, Yurong, Wang, Rong, Chen, Dongliang

“…The nano-nodular surface and thinner thickness exhibited a remarkable contribution to water permeability, which reached 38.3 L m−2h−1bar−1. The narrow pore size distribution made an outstanding Na2SO4 rejection of 99.1 % and Cl−/SO42− selectivity of 83 at 1000 mg/L of mixed salt solution. …”
Get full text

Deformation and failure processes of glass-microballoon epoxy syntactic foam by Naidu, Aravin Dass

“…A pulse shaped Split Hopkinson’s Pressure Bar Test (SHPB) modified for low impedance material testing was used to ensure that the samples deformed under dynamic equilibrium and at a constant strain-rate. …”
Get full text

Spin orbit torques induced magnetization reversal through asymmetric domain wall propagation in Ta/CoFeB/MgO structures by Cao, Jiangwei, Chen, Yifei, Jin, Tianli, Gan, Weiliang, Wang, Ying, Zheng, Yuqiang, Lv, Hua, Cardoso, Susana, Wei, Dan, Lew, Wen Siang

“…Kerr imaging reveals that the current-induced reversal under small and medium in-plane field was mediated by domain nucleation at the edge of the Hall bar, followed by asymmetric domain wall (DW) propagation. …”
Get full text
Get full text

Isolated low temperature heat release from binary blends of iso-octane, n-heptane and ethanol in a spark ignition engine by White, SP, Leach, FCP

“…The blends were tested with inlet temperatures of 40°C to 140°C at an inlet pressure of 0.9 bar (absolute). <br> To simulate the effect of high temperature combustion residuals, a skip spark duty cycle was employed for ignition of a PRF80 blend. …”

Explorations of combined nonsolvent and thermally induced phase separation (N-TIPS) method for fabricating novel PVDF hollow fiber membranes using mixed diluents by Zhao, Jie, Chong, Jeng Yi, Shi, Lei, Wang, Rong

“…The water permeability of the membrane increased significantly from 389 ± 30–922 ± 36 L m–2 h–1 bar–1, with overall porosity improved from 50 ± 2.2–69 ± 2.9%, and a mean pore size of ~ 0.18 µm. …”
Get full text

Synthesis and reactivity of electron-deficient phosphorus(III) compounds by Dordevic, Nemanja

“…Transient formation of [1a]2+ and [1b]2+ is evidenced by activating C-F bonds of trifluorotoluene and [BArF4]- (ArF = (CF3)2-C6H3) anion. The replacement of carbodiphosphorane 1 with more nucleophilic and sterically less demanding carbodicarbene ligand {C6H4(MeN)2C}2C, 2 resulted in a series of P-dications [{C6H4(MeN)2C}2C.PR]2+ (R = NiPr2, Ph, OMe, tBu, Cl) whose spectroscopic and structural features are presented. …”
Get full text