Search results

Thermal Cyclic Behaviour of Conventional YSZ and Mullite-YSZ Thermal Barrier Coatings David Jech1,a*, Pavel Komarov1,b, Michaela Remešová1,c, Lucie Dyčková1,d, Karel Slámečka1,e, Simona Ravaszová2,f, Karel Dvořák2,g and Ladislav Čelko1,h 1Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czech Republic 2Brno University of Technology, Faculty of Civil Engineering, Veveří 331/95, 602 00 Brno, Czech Republic adavid.jech@ceitec.vutbr.cz, bpavel.komarov@ceitec.vutbr.cz, cmichaela.remesova@ceitec.vutbr.cz, dlucie.dyckova@ceitec.vutbr.cz, ekarel.slamecka@ceitec.vutbr.cz, fravaszova.s@fce.vutbr.cz, gdvorak.k@fce.vutbr.cz, hladislav.celko@ceitec.vutbr.cz Keywords: Cyclic oxidation, Atmospheric plasma spraying, Mullite, YSZ, Microstructure, Phase composition.
Materials and Methods The coupons with diameter of 25 mm and thickness of 10 mm manufactured from nickel-based superalloy Inconel 713 LC were used as the substrates.
There is no visible macroscopic failure of the bond coat or top coat after 500 cycles in case of both materials systems.
Virkar, Role of Ferroelasticity in Toughening of Zirconia Ceramics, Key Eng.
Yang, Influence of substrate material on oxidation be-havior and cyclic lifetime of EB-PVD TBC systems, Surf.

Kim d School of Mechanical Engineering, Sungkyunkwan University, Suwon, Kyonggi-do, Korea a pyj0909@skku.edu, byschang7@skku.edu, cboong33@skku.edu, dyjkim50@skku.edu Keywords: Nuclear Piping, Implicit Fatigue Design, Explicit Fatigue Analysis, On-line Monitoring Abstract.
As one of important integrity issue, fatigue damage due to repetitive or fluctuating stress has been recognized which specific effects are cracks in the material.
The pipes and nozzles were grouped for evaluation considering the material, geometry, loading condition and identified in Table 1.
The key design information for Class 1 piping including the material types and re-arranged transient types are also represented in Table 1.
Expansion Stress (a) 40 years (b) 50 years (c) (a)/(b) (a)/(c) RCS Piping Segment 1 Material: A351 CF8M Design Temp.: 343 [°C] Design Pressure: 17.1 [MPa] 89.3 [MPa] 176.6 [MPa] 162.5 [MPa] 0.506 0.550 Explicit Fatigue Analysis Results.

Logistics Management of Bio-diesel Liu Hongwei1, a, Xue Yun1,b , Liu Wuquan1,c , Zhang Wei2,d 1 Department of Automotive Engineering, Military Transportation University, China 2 Equipment Support Department of PLA No.73021 Troop, China aliuhongwei@126.com, bxueyun2000@sohu.com, cliuwuquan@sohu.com, dZhangwei@126.com Keywords: Diesel Engine; Biodiesel; Logistics Management Abstract.
As a key renewable alternative energy, there is an aggressive increase in the biodiesel output and utilization scale.
Materials like chemigum, polypropylene, polythylene, polyvinyl in the equipment and pipeline (if any) should be replaced by stuff such as fluorated polyethylene, fluorated polypropylene, teflon.
The parts material is suggested to be replaced by teflon or copolymer of ordinary rubber and TFE.
The original copper, plastic and rubber sealing elements (like the plastic washer of delivery valve, seal washer of oil return pipe and fuel oil delivery line), if possible, should be substituted by aluminum or teflon material.

Effect analysis and ANN prediction of surface roughness in end milling AISI H13 steel Qing Zhang1, a, Song Zhang1, b*, Jia Man1, c, Bin Zhao1, d 1 Key Laboratory of High Efficiency and Clean Mechanical Manufacture (Ministry of Education), School of Mechanical Engineering, Shandong University, Jinan, Shandong 250061, China azhangqing302@163.com, bzhangsong@sdu.edu.cn (Corresponding author), cmjsdu90s@gmail.com, dzhaobin161@gmail.com Keywords: Surface roughness, S/N ratio, Artificial neural network (ANN), End milling Abstract.
The used workpiece material was AISI H13 tool steel.
The nominal chemical composition and material properties of AISI H13 steel are given in Table 3 and 4, respectively.
The workpiece material was hardened and tempered to 50±1 HRc. 150 mm×100 mm×20 mm rectangular blocks were used as samples.
Table 4 Material properties of AISI H13 tool steel at room temperature Density [kg/m3] Young’s modulus [GPa] Hardness [HRc] Yield stress [MPa] Area reduction [%] Thermal conductivity [W/mK] 7800 210 50±1 1579 23.0 25.6 Surface roughness measurements.

The research of economic evaluation model for construction conserves energy retrofitting technology of existing buildings Guoqi Xing1, a, Weiwei Wang 1,b 1 Architectural Engineering Institute, Weifang University, Weifang, Shandong, 261061, China axgq1105@163.com, bwangweiwei1008@yahoo.cn Keywords: Existing Buildings, Payback Period OF Dynamic Energy, DeST-h Software, conserves energy Simulation.
After deciding energy consumption information of existing building it should definite several key indicators before using the model to make economic analysis.(1)Remaining life cycle of existing building.
The residential building is north-south direction and is brick and concrete structure, 6 layers and storey 3m; The ratio of window area and wall area is 0.6, total area of exterior wall is 743m2 and total area of windows is 459m2,total living area is 1263m2.The palisade structure materials and heat transfer coefficient is shown in table 1.
Fig. 1 building floor plan of residental Table 1 Initial parameters of palisade structure materials Building component of palisade structure Material and tectonic Heat transfer coefficient (W/(m2·K)) Exterior wall 240mm brick wall 1.88 Interior wall 240mm brick wall 1.88 Roof 120mm precast concrete slab 3.71 Floor 120mm precast concrete slab 3.80 Door and window Ordinary aluminium alloy window 6.40 Conserves Energy Retrofitting Scheme.

Oduola Department of Chemical Engineering, University of Port Harcourt, Port Harcourt, Nigeria koye_oduola@yahoo.com Key words: Immobilization, surface-attached radicals, graft polymerization.
EXPERIME�TAL Materials The organic solvents: acetone, benzene, hexane 1,4-dioxane, methyl ethyl ketone and chloroform were purified prior to use by employing the corresponding techniques [10].
Polymerization initiated by TiO2−mod−APM is characterized by deceleration of termination reactions of material and kinetic chains, yielding polymers with high molecular weights.
Voronov: Advanced Materials Research Vols. 18-19 (2007), p. 219 [7] L.

Preparation and Adding Methods of Nessler's Reagent Having Effects on Determination of Water Quality Ammonia Nitrogen Hezhen Wu a, Aie Cao b Anqing Vocational and Technical College, Anqing China azhenhezi67@126.com, bcaoaie@Sohu.com Key words: Nessler's reagent, ectrophotometry, termination of ammonia nitrogen, ality control Abstract.
Materials and Methods Materials.
Lu: Environmental Engineering, Vol. 26 (2008) No. 2, p.71.
(In Chinese) [13] Chemistry for Higher Vocational Education Teaching Material Compilation Group:Analytical Chemistry (the Second Edition)(Higher Education Press, China 2005)

Microstructure and Texture Evolution of Repetitive Upsetting-Extruded (RUEed) Mg-Gd-Y-Zn-Zr Alloy after Hot Compression Beibei Donga, Zhimin Zhangb*, Jianmin Yuc and Xin Ched College of Materials Science and Engineering, North University of China, 3 Xueyuan Road, Taiyuan 030051, China aB1803009@st.nuc.edu.cn, bzhengzhimin@nuc.edu.cn, cyujianmin@nuc.edu.cn, dB1803007@st.nuc.edu.cn Keywords: deformation temperature; compression tests; Mg-Gd-Y-Zn-Zr alloy; dynamic recrystallization (DRX) Abstract.
As the lightest high strength materials, magnesium alloys are very attractive in applications for the automotive, railway and aerospace industries [2-4].
The true stress-true strain curve of the material is a macro manifestation of the microstructure change.
Acknowledgements This work was financially supported by “the Natural Science Foundation of Shanxi Province” (No. 201901D111176), “Key R&D program of Shanxi Province (International Cooperation)” (No. 201903D421036), and “Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi” (No. 201802072) and “Shanxi Graduate Education Innovation Project” (No.2020BY092).

Crack Position Recognition of Metal Deep Drawing Parts Based on BP Neural Network XU JiYong1,a, ZHAO JunLi2,b, ZHAO Bing2, SHAO YingQing2 1Jinshan Vocational and Technical College, Yangzhong, Zhenjiang, Jiangsu,P.R China 2School of Mechanical Engineering, Jiangsu university, Zhenjiang, Jiangsu,P.R China axufanli2006@126.com, bzhaojunli_2006@126.com Key words: BP neural network ; the drawing parts; acoustic emission signal; location identification.
Acoustic emission (AE) is a material or a structure of the internal local area under the influence of external forces, internal forces, or temperature.
Artificial neural network in the detection of crack location has great potential, especially suitable for the material anisotropy and structural complexity [3].
Drawing part's structure and the position of producing crack The material of deep drawing parts is the metal sheet ST14, The diameter of the blank size is 153 mm, the thickness of the sheet metal is 1.4 mm, the biggest drawing depth is 38 mm.
Fundamentals of material forming technology[M].Second edition .Beijing: Higher Education Press, 2010

Isolation and Identification of Photosynthetic Bacteria and Their Hydrogen Production Characterization Yanyan Zhu, Quanguo Zhang, Binxu Han ,Yanyan Jing (College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou, 450002, China) *Corresponding author: zquanguo@163.com Key words：photosynthetic bacteria；hydrogen production；isolate； Abstract: Using special culture medium, dominant photosynthetic bacterias were enriched from sewage silt and paddy fields with plentiful light and organic compounds.
Pure strain has many shortcomings, such as, high sterilization cost, easily being polluted by miscellaneous bacterium, difficult to preserve strains, material using monotonously.
Photosynthetic bacteria in mixing strains have different light absorption spectrum, property of raw material and strains coordinating efficiency[2,3].Therefore, mixing strains possessed high utilization of material and high efficiency of producing hydrogen.
Materials and methods Strains Bacteria source was extracted from animal manure and high organic content of sewage sludg in the surrounding areas of Zhengzhou , and of separated and enriched under illumination.