The Experts below are selected from a list of 243 Experts worldwide ranked by ideXlab platform
Juan Wang - One of the best experts on this subject based on the ideXlab platform.
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In situ fabrication of Titanium Carbide particulates-reinforced iron matrix composites
Materials & Design, 2011Co-Authors: Li Sheng Zhong, Mirabbos Hojamberdiev, Jianbin Wang, Juan WangAbstract:Abstract Titanium Carbide (TiC) particulates-reinforced iron matrix composites were prepared by in situ fabrication method combining an infiltration casting with a subsequent heat treatment. The effects of different heat treatment times (0, 1, 6 and 11 h) at 1138 °C on the phase evolution, microstructural features, and properties of the composites were investigated. The as-prepared composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and microhardness and wear resistance tests. The XRD results showed that the composites consisted of graphite, α-iron and Titanium Carbide after heat treatment at 1138 °C for 11 h. The SEM observation revealed that the formed TiC particulates were homogenously distributed in the iron matrix. The average microhardness of the composite heat treated at 1138 °C for 6 h increased depending upon the region: 209 HV 0.1 (iron matrix) 0.1 (Titanium wire) 0.1 (composite region). After being heat treated at 1138 °C for 11 h, the composite indicated no considerable change in microhardness value, and the average microhardness of the composite region was about 2354 HV 0.1 . The highest microhardness value obtained for the composite region was due to the formation of Titanium Carbide particulates as reinforcement phase within the iron matrix. Relative wear resistance was determined by a pin-on-disc wear test technique under different loads, and as a result, the composites containing higher volume fraction of hard Titanium Carbide particulates presented higher wear resistance compared with the unreinforced gray cast iron.
Li Sheng Zhong - One of the best experts on this subject based on the ideXlab platform.
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In situ fabrication of Titanium Carbide particulates-reinforced iron matrix composites
Materials & Design, 2011Co-Authors: Li Sheng Zhong, Mirabbos Hojamberdiev, Jianbin Wang, Juan WangAbstract:Abstract Titanium Carbide (TiC) particulates-reinforced iron matrix composites were prepared by in situ fabrication method combining an infiltration casting with a subsequent heat treatment. The effects of different heat treatment times (0, 1, 6 and 11 h) at 1138 °C on the phase evolution, microstructural features, and properties of the composites were investigated. The as-prepared composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and microhardness and wear resistance tests. The XRD results showed that the composites consisted of graphite, α-iron and Titanium Carbide after heat treatment at 1138 °C for 11 h. The SEM observation revealed that the formed TiC particulates were homogenously distributed in the iron matrix. The average microhardness of the composite heat treated at 1138 °C for 6 h increased depending upon the region: 209 HV 0.1 (iron matrix) 0.1 (Titanium wire) 0.1 (composite region). After being heat treated at 1138 °C for 11 h, the composite indicated no considerable change in microhardness value, and the average microhardness of the composite region was about 2354 HV 0.1 . The highest microhardness value obtained for the composite region was due to the formation of Titanium Carbide particulates as reinforcement phase within the iron matrix. Relative wear resistance was determined by a pin-on-disc wear test technique under different loads, and as a result, the composites containing higher volume fraction of hard Titanium Carbide particulates presented higher wear resistance compared with the unreinforced gray cast iron.
Yury Gogotsi - One of the best experts on this subject based on the ideXlab platform.
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2d Titanium Carbide mxene for wireless communication
Science Advances, 2018Co-Authors: Asia Sarycheva, A Polemi, Yuqiao Liu, Kapil R Dandekar, Babak Anasori, Yury GogotsiAbstract:With the development of the Internet of Things (IoT), the demand for thin and wearable electronic devices is growing quickly. The essential part of the IoT is communication between devices, which requires radio-frequency (RF) antennas. Metals are widely used for antennas; however, their bulkiness limits the fabrication of thin, lightweight, and flexible antennas. Recently, nanomaterials such as graphene, carbon nanotubes, and conductive polymers came into play. However, poor conductivity limits their use. We show RF devices for wireless communication based on metallic two-dimensional (2D) Titanium Carbide (MXene) prepared by a single-step spray coating. We fabricated a ~100-nm-thick translucent MXene antenna with a reflection coefficient of less than −10 dB. By increasing the antenna thickness to 8 μm, we achieved a reflection coefficient of −65 dB. We also fabricated a 1-μm-thick MXene RF identification device tag reaching a reading distance of 8 m at 860 MHz. Our finding shows that 2D Titanium Carbide MXene operates below the skin depth of copper or other metals as well as offers an opportunity to produce transparent antennas. Being the most conductive, as well as water-dispersible, among solution-processed 2D materials, MXenes open new avenues for manufacturing various classes of RF and other portable, flexible, and wearable electronic devices.
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two dimensional Titanium Carbide mxene as surface enhanced raman scattering substrate
Journal of Physical Chemistry C, 2017Co-Authors: Asia Sarycheva, Taron Makaryan, Kathleen Maleski, Elumalai Satheeshkumar, A Melikyan, Hayk Minassian, Masahiro Yoshimura, Yury GogotsiAbstract:Noble metal (gold or silver) nanoparticles or patterned films are typically used as substrates for surface-enhanced Raman spectroscopy (SERS). Two-dimensional (2D) Carbides and nitrides (MXenes) exhibit unique electronic and optical properties, including metallic conductivity and plasmon resonance in the visible or near-infrared range, making them promising candidates for a wide variety of applications. Herein, we show that 2D Titanium Carbide, Ti3C2Tx, enhances Raman signal from organic dyes on a substrate and in solution. As a proof of concept, MXene SERS substrates were manufactured by spray-coating and used to detect several common dyes, with calculated enhancement factors reaching ∼106. Titanium Carbide MXene demonstrates SERS effect in aqueous colloidal solutions, suggesting the potential for biomedical or environmental applications, where MXene can selectively enhance positively charged molecules.
R. Jones - One of the best experts on this subject based on the ideXlab platform.
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In situ fabrication of Titanium Carbide reinforced copper MMC
Materials Science and Technology, 2003Co-Authors: J. Bannan, R. I. Temple, R. JonesAbstract:AbstractThe in situ fabrication of Titanium Carbide reinforced copper and aluminium bronze (AB2) composites by carbothermal reduction of Titanium in an induction furnace has been investigated. An inert atmosphere was maintained with carbon monoxide created as a byproduct from the heat of reaction between the induction field, graphite crucible and graphite lid. Titanium Carbide particles of the order 1–3 μm were formed in aluminium bronze at approximately 1250°C and, in copper, particles of order 1–6 μm were produced at approximately 1330°C. Dispersion concentrations of Titanium Carbide of 20% and 6.5% were obtained for copper and aluminium bronze respectively. In addition, evidence is presented indicating that iron could be used as a dispersion medium for Titanium Carbide particulates in aluminium bronze alloys.
Chunhe Tang - One of the best experts on this subject based on the ideXlab platform.
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Porous Titanium Carbide ceramics fabricated by coat-mix process
Scripta Materialia, 2006Co-Authors: Limin Shi, Hongsheng Zhao, Yinghui Yan, Chunhe TangAbstract:Porous Titanium Carbide ceramics are fabricated by the coat-mix process with phenolic resin as the carbon source, and titania powders as the Titanium source. The phase composition, residual free carbon content, and microstructure have been investigated by X-ray diffraction, thermogravimetric analysis, and scanning electron microscopy, respectively. The results indicate that phase-pure Titanium Carbide materials can be obtained using this process. A large number of pores exist in the fabricated Titanium Carbide ceramics.
