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Vijayasimha Reddy, B. G.
- Development and Experimental Study of Copper Selenide based Thermo-Electric Material by the Method of Powder Metallurgy
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Authors
Affiliations
1 Department of Mechanical Engineering, Vemana Institute of Technology, Bangalore, Karnataka, IN
2 Department of Mechanical Engineering, SV University, Tirupati, Andhra Pradesh
1 Department of Mechanical Engineering, Vemana Institute of Technology, Bangalore, Karnataka, IN
2 Department of Mechanical Engineering, SV University, Tirupati, Andhra Pradesh
Source
Manufacturing Technology Today, Vol 18, No 12 (2019), Pagination: 12-17Abstract
Copper Selenide is one of the promising single crystal thermoelectric material for power generation in low temperature range 300 - 360 K. Universal testing machine is used for pressing the Nano powder to obtain the Nano bulk samples. By using X-ray diffraction (XRD) and scanning electronic microscope (SEM) identified the structure and phase composition. This study shown that 150 kN pressing force in sample without carbon nano tubes showed ZT=1.2 at a temperature of 322K. It is also shown that thermal conductivity and power factor is mainly influencing the value of thermoelectric efficiency of the studied materials.Keywords
Thermoelectric Materials, Nano Scale, Green Synthesis, Figure of Merit.
References
- Pennelli, Giovanni: Review of nanostructured devices for thermoelectric applications, 'Beilstein Journal of Nanotechnology', 2014, 5, 1268–1284. doi:10.3762/bjnano.5.141.
- Chen, Zhi-Gang; Han, Guang; Yang, Lei; Cheng, Lina; Zou, Jin: Nanostructured thermoelectric materials: Current research and future challenge, 'Progress in Natural Science: Materials International', vol. 22, no. 6, December 2012, 535-549.
- Liu, Yufei; Zhou, Menghan; He, Jian: Towards higher thermoelectric performance of Bi 2 Te3 via defect engineering, 'Scripta Materialia', vol. 111, 15 January 2016, 39-43.
- Kang, Stephen Dongmin; Pöhls, Jan-Hendrik; Aydemir, Umut; Qiu, Pengfei; Stoumpos, Constantinos C; Hanus, Riley; White, Mary Anne; Shi, Xun; Chen, Lidong; Kanatzidis, Mercouri G; Snyder, G Jeffrey: Enhanced stability and thermoelectric figure-of-merit in copper selenide by lithium doping, 'Materials Today Physics', vol. 1, June 2017, 7-13.
- Ivanova, AA; Osvenskiib, VB; Sorokin, AI; Panchenko, VP; Bulat, LP; Akchurin, R Kh.: Obtaining material based on copper selenide by the methods of powder metallurgy, 'Russian Microelectronics', vol. 46, 2017, 545-550.
- Blanc, Saniya Le: Thermoelectric generators: Linking material properties and systems engineering for waste heat recovery applications, 'Sustainable Materials and Technologies', vol. 1–2, December 2014, 26-35.
- Zheng, Jin-cheng: Recent advances on thermoelectric materials, 'Frontiers of Physics in China', vol. 3, 2008, 269-279
- External Inversion of Aluminium Tubes Under Static and Dynamic Compression
Abstract Views :349 |
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Authors
Affiliations
1 Vemana Institute of Technology, Bengaluru, IN
1 Vemana Institute of Technology, Bengaluru, IN
Source
Manufacturing Technology Today, Vol 20, No 5-6 (2021), Pagination: 15-20Abstract
Inversion of metal tubes has been acquired for many years to act as affect energy absorbers. Metal tubes turned inside-out or outside-in and tears via pressing them axially onto machine die. Experiments to find out about the exterior inversion ability of aluminium round tubes beneath quasi-static and dynamic axial conditions had been conducted. Also, FEM evaluation has been achieved and the equal is compared with experimental results.Keywords
Inversion, Quasi-Static, Dynamic, Hypermesh, LS-Dyna, Impact, Compression.References
- Abbasi, K., & Shirazi, A. (2013). Finite Element Modeling of External Inversion and Comparison of Results with Existed Experimental and Theoretical Results. Applied Mechanics and Materials, 467, 374-379.
- Al-Hassani, S. T. S., Johanson, W., & Lowe, W. T. (1972). Characteristics of inversion tubes under axial loading. Journal mechanical engineering science, 370-381.
- Gupta, P., & Gupta, N. (2013). Investigation of External Inversion of Thin-Walled Tubes.
- Niknejad, A., & Moeinifard, M (2012). Theoretical and experimental studies of external inversion process in circular metal tubes. Materials and Design, 40, 324-330.
- Otubushin, A. (1998). Detailed validation of a non-linear finite element code using dynamic axial crushing of a square tube. International Journal of Impact Engineering, 21(5), 349-367.
- Reddy, T., & Reid, S.R. (1979). On obtaining material properties from the ring compression test. Nuclear Engineering and Design, 52, 257-263.
- Reddy, T. Y. (1989). Tube inversion- an experiment in plasticity. International Journal of Mechanical Engineering Education, 17, 277-292.
- Reid, S. R. and Reddy, T. Y. (1986). Axially loaded metal tubes as impact energy absorbers. Inelastic Behaviour of Plates and Shells, 569-595.
- Reid, S. R. (1993). Plastic deformation mechanisms in axially compressed metal tubes used as impact energy absorbers. International Journal of Mechanical Sciences, 35(12), 1035-1052.
- Rosa, P. A. R., Rodrigues, J. M. C. & Martins, P. A. F. (2004). Internal inversion of thin-walled tubes using adie: Experimental and theoretical investigation. International journal of machine tools and manufacture. 44(7-8), 775-784.