CHEM02200704003 Nilamadhab Pandhy - Homi Bhabha National ...

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Chapter 5 Presence of oxygen is due to the superficial oxide layers, and carbon at the surface is due to contamination during sample handling. For both the elements tailing was observed with increase in depth of sputtering, and intensity was much less as compared to major alloying elements. In case of nitrogen implanted sample (Fig. 5.2b) enrichment of nitrogen on the surface was observed in the form of two peaks. Owing to enrichment of nitrogen on the surface the corresponding profiles for Fe, Cr, and Ni showed initial decrease by passing through a shallow region, and attained steady state with increase in depth of sputtering [21]. Intensity (Arbitrary units) Fe 54 Cr 50 Ni 58 O 16 C 12 N 14 0 100 200 300 400 500 Depth (nm) Fig. 5.2b: SIMS analysis of nitrogen implanted 304L SS (dose 2.5×10 17 N + /cm 2 ) [21]. SIMS Study by Guemmaz et al [154] for nitrogen implanted 316L SS also revealed two peaks in the nitrogen profile. The result obtained in the present study is in well agreement with study carried out by Guemmaz et al, and the possible reason for such type of peaks is attributed to different rate of sputtering of nitrogen from the surface, and from chromium nitride phase that forms at higher doses [21, 154].
Chapter 5 5.2. 3 Study of phase formation by GIXRD The Glancing Incidence X-Ray Diffraction patterns for unimplanted, and nitrogen implanted 304L SS at doses of 1×10 16 N + /cm 2 , 1×10 17 N + /cm 2 and 2.5×10 17 N + /cm 2 are depicted in Fig. 5.3 [21]. (d) Cr 2 N (111) γFe(200) γFe(220) Intensity (arbitrary units) (c) (b) (a) Cr 2 N (111) γFe(111) γFe(200) α'Fe(110) γFe(200) γFe(111) α'Fe(110) γFe(200) α'Fe(200) α'Fe(200) γFe(220) γFe(220) (d) 2.5 x 10 17 N + /cm 2 (c) 1 x 10 17 N + /cm 2 (b) 1 X 10 16 N + /cm 2 (a) AISI 304L SS γFe(220) α'Fe(211) α'Fe(211) 30 40 50 60 70 80 90 2θ (degrees) Fig. 5.3: GIXRD analysis of unimplanted, and nitrogen implanted 304L SS [21]. The profile for unimplanted specimens mostly revealed the presence of austenite peak at 43.7º [Fe(111)], and martensite peak at 44.7º [αFe(110)], respectively [155]. The martensite peak observed was due to work hardening of surface by mechanical grinding, and polishing during specimen preparation. Other peaks occurring at 50.7°, 65°, 74.8 o , and 82.3 o corresponds to - Fe(200), α-Fe(200), -Fe(220), and ´-Fe (211) respectively [156]. The possible reason for the appearance of abnormal austenite, and martensite peaks is ascribed to existence of stacking faults on (111) plane of fcc lattice during cold rolling or most probably during mechanical preparation of specimens [157,158]. At a dose of 1×10 16 N + /cm 2 peaks observed were same except that, there
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2.3 Effect of alloying elements on
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4 C H A P T E R 4 73 # $%&' 4.1 In
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6.2.3.2 Open circuit potential vs.
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eprocessing can be recovered, and c
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The ex-situ study of passive film w
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Fig.3.10: Schematic of electrical e
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Fig.6.11: Polarization study of unc
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AISI: American Institute of Steel I
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Chapter 1 C H A P T E R 1 Spent Nuc
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Chapter 1 1.3 Challenges in spent n
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Chapter 1 corrosion resistance. The
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Chapter 1 choice of zirconium is du
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C H A P T E R2
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Chapter 2 temperature, (c) higher i
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Chapter 2 Chromium in excess of 12
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Chapter 2 2. 3 Effect of alloying e
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Chapter 2 The twins are identified
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Chapter 2 and at temperature around
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Chapter 2 of adsorption of oxygen o
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Chapter 2 transpassive dissolution
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Chapter 2 healing chromium oxide fi
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Chapter 2 their segregation to the
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Chapter 2 is intimately related to
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Chapter 2 in nature because the dis
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C H A P T E R3
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Chapter 3 3.1.1.2 Specimen preparat
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Chapter 3 ionized. However, differe
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Chapter 3 various industrial applic
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Chapter 3 In the present investigat
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Chapter 3 3.1.3.2 Atomic force micr
Page 68 and 69: Chapter 3 present on the surface fo
Page 70 and 71: Chapter 3 necessary condition is th
Page 72 and 73: Chapter 3 Y m is the sputter yield.
Page 74 and 75: Chapter 3 Fig. 3.7: Schematic of X-
Page 76 and 77: Chapter 3 rate of 10Å/min using 5
Page 78 and 79: Chapter 3 different doses of nitrog
Page 80 and 81: Chapter 3 The modulus of electroche
Page 82 and 83: Chapter 3 equivalent circuit as sho
Page 84 and 85: Chapter 3 reference electrode with
Page 86 and 87: Chapter 3 for understanding the pas
Page 88 and 89: C H A P T E R4
Page 90 and 91: Chapter 4 encountered by all materi
Page 92 and 93: Chapter 4 pitting, and intergranula
Page 94 and 95: Chapter 4 The ridged structure, and
Page 96 and 97: Chapter 4 nitric acid is that the b
Page 98 and 99: Chapter 4 Potential (V) Vs Ag/AgCl
Page 100 and 101: Chapter 4 4.2.3 In-situ electrochem
Page 102 and 103: Chapter 4 The surface morphologies
Page 104 and 105: Chapter 4 a b c d Opening up of gra
Page 106 and 107: Chapter 4 Intensity (Arbitrary unit
Page 108 and 109: Chapter 4 The chromium, and oxygen
Page 110 and 111: Chapter 4 Intensity (Arbitrary unit
Page 112 and 113: C H A P T E R5
Page 114 and 115: Chapter 5 elements, and often impar
Page 116 and 117: Chapter 5 5.2 Results and discussi
Page 120 and 121: Chapter 5 was an increase in marten
Page 122 and 123: Chapter 5 formation of Cr 2 N was a
Page 124 and 125: Chapter 5 electrochemical environme
Page 126 and 127: Chapter 5 N + Dose E corr (mV vs. A
Page 128 and 129: Chapter 5 layer capacitance (C dl )
Page 130 and 131: Chapter 5 correlation between surfa
Page 132 and 133: Chapter 5 boundary dissolution was
Page 134 and 135: Chapter 6 C H A P T E R 6
Page 136 and 137: Chapter 6 193]. As a single phase c
Page 138 and 139: Chapter 6 particles range from 8×1
Page 140 and 141: Chapter 6 Results revealed that in
Page 142 and 143: Chapter 6 The change over from capa
Page 144 and 145: Chapter 6 The impedance parameters
Page 146 and 147: Chapter 6 Conc. Substrate condition
Page 148 and 149: Chapter 6 6.6a-d. The uncoated spec
Page 150 and 151: Chapter 6 (55.18°) respectively, w
Page 152 and 153: Chapter 6 OCP shifted in noble dire
Page 154 and 155: Chapter 6 The high phase angle over
Page 156 and 157: Chapter 6 Fig. 6.10d: Log f vs. Log
Page 158 and 159: Chapter 6 Fig. 6.11b: Polarization
Page 160 and 161: Chapter 6 Covalent aspect of lattic
Page 162 and 163: Chapter 6 As compared to uncoated s
Page 164 and 165: Chapter 6 6.2.3.2 Open circuit pote
Page 166 and 167: Chapter 6 Similarly, the plots for
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Chapter 6 for the duplex coating, a
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Chapter 6 Fig.6.16b: Polarization s
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Chapter 6 6.2.3.5 Morphological exa
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Chapter 7 C H A P T E R 7 The cha
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Chapter 7 1. Surface morphology exa
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Chapter 7 6 Duplex Ti-TiO 2 coated
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Chapter 7 EC-SPM study on effect
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[1] Baldev Raj, U. Kamachi Mudali,
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[37] G. Okamoto, T. Shibata, Corros
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[79] M. Moens, M. Van Craen, F.C. A
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[117] R.E.Williford, C.F.Windisch J
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[157] N. Mottu, M. Vayer, R. Erre,
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[197] M. Metikos Hukovic, M. Ceraj
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[19] H. H. Uhlig, Corros Sci, 19 (1
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[57] J. F. Ziegler, J. P. Biersack,
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[97] I. Betova, M. Bojinov, V. Kara
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[139] V. Ashworth, R. P. M. Procter
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[176] G. Frankel, G. Grundmeier, H.
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List of publications 1. Referred
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CHEM02200704003 Nilamadhab Pandhy - Homi Bhabha National ...

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