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Preparation and properties of supersonic atmospheric plasma sprayed TiB2−SiC coating 被引量:7
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作者 Ke ZOU Jian-peng ZOU +6 位作者 Chun-ming DENG Min LIU Xue-zhang LIU Rui-min ZHAO Shun-hua LI Ren-bo ZHU Di GAO 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2021年第1期243-254,共12页
With the TiB2−SiC powders after spray granulation and vacuum calcination as raw materials,the TiB2−SiC coating was prepared by supersonic atmospheric plasma spraying(SAPS).The effects of spraying power and spraying di... With the TiB2−SiC powders after spray granulation and vacuum calcination as raw materials,the TiB2−SiC coating was prepared by supersonic atmospheric plasma spraying(SAPS).The effects of spraying power and spraying distance on the properties of the TiB2−SiC coating were investigated and the fabrication processing of SAPS was optimized.The results show that the sprayed powders after calcination have a uniform particle size distribution,good sphericity and enhanced fluidity.The coating prepared by the calcined powders has a dense structure and high deposition efficiency.When the calcined TiB2−SiC powders are used and the spraying power is 95 kW and the spraying distance is 150 mm during supersonic plasma spraying,the obtained TiB2−SiC coating behaves the best comprehensive performance with the porosity,microhardness,bonding strength and resistivity equal to 5.6%,3.57 GPa,18.3 MPa and 10.8 mΩ·cm,respectively. 展开更多
关键词 supersonic atmospheric plasma spraying(SAPS) tib2−SiC coating vacuum calcination processing optimization
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Electrical resistivity of TiB_2/C composite cathode coating for aluminum electrolysis 被引量:6
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作者 李劼 吕晓军 +2 位作者 李庆余 赖延清 杨建红 《Journal of Central South University of Technology》 EI 2006年第3期209-213,共5页
The electrical resistivity of TiB2/C cathode composite coating at different temperatures was measured with the electrical conductivity test device; the effects of TiB2 content and kinds of carbonaceous fillers as well... The electrical resistivity of TiB2/C cathode composite coating at different temperatures was measured with the electrical conductivity test device; the effects of TiB2 content and kinds of carbonaceous fillers as well as their mean particle size on their electrical resistivities were investigated. The results show that electrical resistivity of the coating decreases with the increase of TiB2 content and the decrease of its mean particle size. When the mass fraction of TiB2 increases from 30% to 60%, the electrical resistivity of the coating at room temperature decreases from 31.2μΩ·m to 23.8μΩ·m. The electrical resistivity of the coating at 960℃ lowers from 76.1μΩ· m to 38.4μΩ·m with the decrease of TiB2 mean particle size from 12μm to 1μm. The kinds of carbonaceous fillers have great influence on the electrical resistivity of TiB2/C composite coating at 960℃, when the graphite, petroleum coke and anthracite are used as fillers, the electrical resistivities of the coating are 20.3μΩ·m, 53.7μΩ·m and 87.2μΩ·m, respectively. For the coating with petroleum coke filler, its electrical resistivity decreases with the increase of the mean particle size of petroleum coke filler. The electrical resistivity at 960℃ decreases from 56.2μΩ·m to 48.2μΩ·m with the mean particle size of petroleum coke increasing from 44μm to 1200μm. However, too big carbonaceous particle size has adverse influence on the abrasion resistance of coating. Its proper mean particle size is 420μm. 展开更多
关键词 aluminum electrolysis composite material tib2 coating electrical resistivity
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Effect of carbon fibre on properties of TiB_2/C composite cathode coating for aluminum electrolysis 被引量:1
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作者 李劼 吕晓军 +3 位作者 赖延清 李庆余 田忠良 方钊 《Journal of Central South University of Technology》 2008年第4期526-530,共5页
The tensile strength,compressive strength and electrical resistivity of TiB2/C composite cathode coating were measured with a hydraulic pressure universal test machine and an electrical resistivity test device,and the... The tensile strength,compressive strength and electrical resistivity of TiB2/C composite cathode coating were measured with a hydraulic pressure universal test machine and an electrical resistivity test device,and the effects of carbon fibre content and carbon fibre length on tensile strength,compressive strength and electrical resistivity were investigated.The results show that the tensile strength of coating increases at the beginning and then reduces with the increase of carbon fibre content when the carbon fibre(length of 3 mm)content ranges from 0 to 4.0%;at the carbon fibre content of 1.5%,the tensile strength of coating reaches the maximum,25.6 MPa.For the coating with carbon fibre content of 1.5%,the carbon fibre length has a great influence on tensile strength and compressive strength of coating;when the carbon fibre length is 6 mm,the tensile strength and compressive strength of coating reach the maximum,27.6 MPa and 39.2 MPa,respectively.The electrical resistivity of coating reduces with the rise of temperature and the length of carbon fibre,and the influence of carbon fibre length on electrical resistivity of coating at low temperature(30-200℃)is more obvious than that at high temperature(960℃). 展开更多
关键词 aluminum electrolysis tib2 coating electrical resistivity tensile strength compressive strength
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Colloidal Alumina-bonded TiB_2 Coating on Cathode Carbon Blocks in Aluminum Cells
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作者 Huimin Lu, Lanlan Yu, Chao Wang, Peng Sun (Department of Nonferrous Metallurgy, University of Science and Teclmology Beijing, Beijing 100083, China) 《Rare Metals》 SCIE EI CAS CSCD 2001年第2期101-106,共6页
Self-propagating high-temperature synthesis (SHS) with reduction process was used to fabricate TiB2 powder from TiO2-B2O3-Mg system. The colloidal alumina-bonded TiB2 paste was prepared and coated on the cathode carbo... Self-propagating high-temperature synthesis (SHS) with reduction process was used to fabricate TiB2 powder from TiO2-B2O3-Mg system. The colloidal alumina-bonded TiB2 paste was prepared and coated on the cathode carbon blocks. Various properties of the baked paste such as the corrosive resistance, thermal expansion and wettability were tested. Experimental results showed that the colloidal alumina-bonded TiB2 coating could be well wetted by liquid aluminum; and the thermal expansion coefficient of the coated material was 5.8x10(-6) degreesC(-1) at 20-1000 degreesC, which was close to that of the traditional anthracite block cathode (4x10(-6) degreesC(-1)); the electrical resistivity was 8 mu Omega (.)m at 900 degreesC when the content of alumina in the coated material was about 9% in mass fraction. In addition, some other good results such as sodium resistance were also reported. 展开更多
关键词 self-propagating high-temperature synthesis reduction process colloidal alumina-bonded tib2 coating carbon CATHODE aluminum reduction cell
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