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Zuli Mao and Li Yang
We report the synthesis of SiC/Si3N4 coatings on carbon/carbon composites via pack cementation and heat treatment with nitrogen gas, the latter of which improves the coating wear resistance. X-ray diffraction (XRD), scanning electron microscopy (SEM), en...
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Emi Kawai, Hideki Kakisawa, Atsushi Kubo, Norio Yamaguchi, Taishi Yokoi, Takashi Akatsu, Satoshi Kitaoka and Yoshitaka Umeno
For design of multi-layered environmental barrier coatings (EBCs), it is essential to assure mechanical reliability against interface crack initiation and propagation induced by thermal stress owing to a misfit of the coefficients of thermal expansion be...
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Anandkumar Naorem, Somasundaram Jayaraman, Ram C. Dalal, Ashok Patra, Cherukumalli Srinivasa Rao and Rattan Lal
Soil organic carbon (SOC) pool has been extensively studied in the carbon (C) cycling of terrestrial ecosystems. In dryland regions, however, soil inorganic carbon (SIC) has received increasing attention due to the high accumulation of SIC in arid soils ...
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Yingying Wang, Bernard Normand, Xinkun Suo, Marie-Pierre Planche, Hanlin Liao and Junlei Tang
As an emerging coating building technique, cold spraying has many advantages to elaborate Mg alloy workpieces. In this study, AZ91D coatings and AZ91D-based composite coatings were deposited using cold spraying. Coatings were prepared using different gas...
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Tao Feng, Mingde Tong, Shuotian Yao and Shifeng Wen
To optimize the ablation resistance of ZrC coating, ZrC-SiC dispersive biphasic coating was prepared by chemical vapor co-deposition. The ablation resistances of the coatings were carried out by oxyacetylene flame tests. Compared with double-layered ZrC/...
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Yuzhe Hong, Fangmin Xie, Lijun Xiong, Mingliang Yu, Xiangqian Cheng, Mingjie Qi, Zhiwei Shen, Guoping Wu, Tian Ma and Nan Jiang
Laminated ceramics with weak interface layers have been proven to be effective in toughening ceramics. The energy absorption ability of laminated ceramics may also benefit their ballistic performance. However, the effect of the layer structure on the bal...
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Mia Dujmovic, Nevena Opacic, Sanja Radman, Sanja Fabek Uher, Sandra Voca and Jana ?ic ?labur
As the impact of global warming intensifies drought effects, plants need to adapt to drought and other climate change-induced stresses through various defense mechanisms. One of them is the increased synthesis of bioactive compounds (BCs), which helps pl...
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Frederick Ojiemhende Ehiagwina,Olufemi Oluseye Kehinde,Lateef Olashile Afolabi,Hassan Jimoh Onawola,Nurudeen Ajibola Iromini
Pág. 133 - 141
Properties of Silicon Carbide Junction Field Effect Transistor (SiC JFET) such as high switching speed, low forward voltage drop and high temperature operation have attracted the interest of power electronic researchers and technologists, who for many ye...
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Chuanbo Hu, Ying Li, Jiawei Zhang and Wenlong Huang
The purpose of this research was to study the structure and corrosion resistance of poly(o/m-toluidine)-SiC/zinc (Zn) bilayer coatings. Poly(o/m-toluidine) films, such as poly(o-toluidine) (POT) and poly(m-toluidine) (PMT), were chemically deposited on t...
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Ambreen Nisar and Kantesh Balani
The refractory diborides (HfB2 and ZrB2) are considered as promising ultra-high temperature ceramic (UHTCs) where low damage tolerance limits their application for the thermal protection system in re-entry vehicles. In this regard, SiC and CNT have been ...
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Md. Aleem Pasha,Dr. P. Ravinder Reddy,Dr. P. Laxminarayana,Dr. Ishtiaq Ahmad Khan
Welding of magnesium alloys influence a great effect on magnesium application expansion, especially in marine and aerospace where large-size, complex components are required. Due to specific physical properties of magnesium, its welding requires great co...
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Amer Morshed and Abdulhadi Ramadan
Using a qualitative research design, this study examined the inventory valuation conflict between financial managers and auditors and its implications for the International Accounting Standard 2 (IAS 2). This study found that the conflict arose due to th...
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Michal Pra?enica, Slavomír Ka?cák and Patrik Resutík
This article addressed the problem of matrix converters (MxC), specifically the investigation of power losses and matrix converter efficiency in a 3 × 5 arrangement. In today?s modern world, efficiency is very important; hence, power loss and efficiency ...
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Mohamed Abdelmoula, Alejandro Montón Zarazaga, Gökhan Küçüktürk, Francis Maury, David Grossin and Marc Ferrato
Direct-Powder Bed Selective Laser Processing (D-PBSLP) is considered a promising technique for the Additive Manufacturing (AM) of Silicon Carbide (SiC). For the successful D-PBSLP of SiC, it is necessary to understand the effects of process parameters. T...
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Sa Yang, Suoping Li, Nana Yang and Ying Lin
To solve the conflict when multi-user packets are transmitted in a shared wireless link, a novel frameless slotted-ALOHA protocol is proposed. Signature codes are used to help the receiver identify the set of transmitting users, and successive interferen...
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Quanhong Liu, Ren Zhang, Yangjun Wang, Hengqian Yan and Mei Hong
To meet the increasing sailing demand of the Northeast Passage of the Arctic, a daily prediction model of sea ice concentration (SIC) based on the convolutional long short-term memory network (ConvLSTM) algorithm was proposed in this study. Previously, s...
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Xianzheng Deng, Xin Bian and Mingqi Li
In order to improve system coverage performance, in this paper, a multi-service transmission scheme on the basis of the puncturing technique, namely layered division multiplexing extension frequency-division multiplexing (LDM-Ex-FDM), is proposed. The ke...
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Renier Koen, Izak J Van der Walt, Arnold A Jansen, Philippus L Crouse
Pág. 1 - 6
Die fluoorradikale wat in ?n nie-termiese CF4-radiofrekwensieplasma (glimontladingsplasma) opgewek word, reageer geredelik met silikoonkarbied (SiC) met die vorming van vlugtige SiF4 en CF4. In ?n spuitbedopstelling wat hier gebruik word, bewer...
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M. Bakowski, J. Lang, J-K. Lim, J. Hellén, T.M.J. Nilsson, B. Schodt, R. Poder, I. Belov, P. Leisner
Pág. 157 - 165
The RF power amplifier demonstrators containing each one GaN-on-SiC, HEMT, CHZ015A-QEG, from UMS in SMD quad-flat no-leads package (QFN) were subjected to thermal cycles (TC) and power cycles (PC) and evaluated electrically, thermally and structurally. T...
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Pedro F. Mayuet Ares, Lucía Rodríguez-Parada, Álvaro Gómez-Parra and Moises Batista Ponce
Metal matrix composite (MMC) materials are increasingly used in industrial sectors such as energy, structural, aerospace, and automotive. This is due to the improvement of properties by the addition of reinforcements. Thus, it is possible to obtain prope...
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