| Pulsed ion beam-assisted carburizing of titanium in methane discharge |
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| 作者姓名： | M.Shafiq M.Hassan K.Shahzad A.Qayyum S.Ahmad R.S.Rawat M.Zakaullah |
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| 作者单位： | Department of Physics,Quaid-i-Azam University Department of Physics,GC University National Tokamak Fusion Program Natural Sciences and Science Education,National Institute of Education,Nanyang Technological University |
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| 基金项目： | Project partially supported by the HEC research project at QAU Islamabad. One of the authors （K. Shahzad） is grateful to the NESCOM for providing financial support for his M. Phil studies. |
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| 摘 要： | The carburizing of titanium (Ti) is accomplished by utilizing energetic ion pulses of a 1.5 kJ Mather type dense plasma focus (DPF) device operated in methane discharge. X-ray diffraction (XRD) analysis confirms the deposition of polycrystalline titanium carbide (TiC). The samples carburized at lower axial and angular positions show an improved texture for a typical (200)TiC plane. The Williamson-Hall method is employed to estimate average crystallite size and microstrains in the carburized Ti surface. Crystallite size is found to vary from ～ 50 to 100 nm, depending on the deposition parameters. Microstrains vary with the sample position and hence ion flux, and are converted from tensile to compressive by increasing the flux. The carburizing of Ti is confirmed by two major doublets extending from 300 to 390 cm-1 and from 560 to 620 cm-1 corresponding to acoustic and optical active modes in Raman spectra, respectively. Analyses by scanning electron microscopy/energy dispersive x-ray spectroscopy (SEM/EDS) have provided qualitative and quantitative profiles of the carburized surface. The Vickers microhardness of Ti is significantly improved after carburizing.
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| 关 键 词： | carbide plasma focus microstructure surface morphology |
Pulsed ion beam-assisted methane carburizing of titanium in discharge |
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| M.Shafiq M.Hassan K.Shahzad A.Qayyum S.Ahmad R.S.Rawat M.Zakaullah.Pulsed ion beam-assisted carburizing of titanium in methane discharge[J].Chinese Physics B,2010(1):247-256. |
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| Authors: | M Shafiq M Hassan K Shahzad A Qayyum S Ahmad RS Rawat M Zakaullah |
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| Institution: | [1]Department of Physics, Quaid-i-Azam University, 45320 Islamabad, Pakistan [2]Department of Physics, GC University, 54000 Lahore, Pakistan [3]National Tokamak Fusion Program, P O Box 3329 Islamabad, Pakistan [4]Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, NIE BLKT, 1 Nanyang Walk, Singapore 637616, Singapore |
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| Abstract: | carbide, plasma focus, microstructure, surface morphology |
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| Keywords: | carbide plasma focus microstructure surface morphology |
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