Multi-component boron coatings on low carbon steel AISI 1018

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The results have shown that adding transition metals into the B-Fe system caused the formation of solid solution of transition-metal borides. The distortion of crystal lattice parameters generated microstrain in the boride phase. The Synchrotron microdiffraction confirmed the presence of about 5-10 microns of transition-metal boride phase at the surface. Moreover, the additional transition metal can provide better corrosion and high temperature oxidation resistance to the B-Fe system, preventing the de<strong>boron</strong>izing and stabilizing the boride phases.
MULTI-COMPONENT BORON COATINGS ON LOW CARBON STEEL AISI 1018 by Naruemon Suwattananont A Dissertation Submitted to the Faculty of New Jersey Institute of Technology in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in Materials Science and Engineering Interdisciplinary Program in Materials Science and Engineering May 2010
Page 1 and 2: Copyright Warning & Restrictions Th
Page 3: ABSTRACT MULTI-COMPONENT BORON COAT
Page 7 and 8: APPROVAL PAGE MULTI-COMPONENT BORON
Page 9 and 10: Roumiana S. Petrova, Naruemon Suwat
Page 11 and 12: vii
Page 13 and 14: TABLE OF CONTENTS Chapter Page 1 IN
Page 15 and 16: TABLE OF CONTENTS (Continued) Chapt
Page 17 and 18: TABLE OF CONTENTS (Continued) Chapt
Page 19 and 20: LIST OF TABLES Table Page 2.1 The M
Page 21 and 22: LIST OF FIGURES (Continued) Figure
Page 27 and 28: CHAPTER 1 INTRODUCTION 1.1 Objectiv
Page 29 and 30: 3 borosiliconizing using bo
Page 31 and 32: 5 During boronizin
Page 33 and 34: 7 the FeB/Fe2B interface. Such crac
Page 35 and 36: 9 nickel metal do not show the stro
Page 37 and 38: 11 2.3.2 Paste Boronizing The paste
Page 39 and 40: 13 2.3.5 Plasma Boronizing The plas
Page 41 and 42: 15 Table 2.2 The Multi</str
Page 43 and 44: 17 Proportion of alloying elements,
Page 45 and 46: 19 when boronizing
Page 47 and 48: 21 in the process of powder pack <s
Page 49 and 50: 23 Torun [46] studied the b
Page 51 and 52: 25 10 3 Figure 2.4 The effect of st
Page 53 and 54: 27 • The surface hardness of <str
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29 Figure 2.7 The hardness value fo
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31 2.7 Research and Development on
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33 Instead of toxic borane and <str
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35 Tsipas et al. [76] utilized the
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37 Buijnsters et al. [85] investiga
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39 in terms of thickness and microh
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41 these boride layers reduced the
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43 The decorative boride co
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CHAPTER 3 MULTI-COMPONENT BORONIZIN
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47 3.2.2 Procedures of Boronizing H
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49 Specimen Sample Preparation proc
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51 View direction through a microsc
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53 thicknesses was shown as a histo
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55 the test force, gf the length of
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57 3.3.4 Corrosion Resistance Testi
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59 2. Quantitative Phase Analysis Q
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61 B. The variance of the crystalli
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63 SDI Application software was use
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65 The Intensity /k can be refined
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67 The profile value: The weighted
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69 In Figure 4.1 b), the coating im
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71 4.1.2 Phase Identification The X
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73 Table 4.1 The Lattice Parameters
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75 4.1.4 Corrosion Resistance The c
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77 4.2 Boron- Chromium - Iron (B -
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83 4.2.4 Mierohardness In B-Cr-Fe s
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85 4.2.6 Oxidation Resistance The h
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Figure 4.13 The morphology images o
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Figure 4.14 The XRD pattern (refine
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91 Figure 4.15 The microdiffraction
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93 4.3.5 Corrosion Resistance The c
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95 4.4 Boron — Tungsten - Iron (B
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Figure 4.23 The mierofluoreseence o
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103 4.4.5 Corrosion Resistance The
Page 131 and 132:
105 4.5 Boron — Niobium - Iron (B
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107 4.5.2 Phase Identification The
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109 Table 4.5 The Lattice Parameter
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M 11 4.5.4 Microhardness In B-Nb-Fe
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113 4.5.6 Oxidation Resistance The
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Figure 4.34 The morphology images o
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Figure 4.35 The XRD pattern (refine
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1119 Figure 4.36 The microdiffracti
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123 4.7 Boron — Titanium - Iron (
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131 4.8 Boron — Zirconium - Iron
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139 4.9 Boron — Hafnium - Iron (B
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g 145 4.9.5 Oxidation Resistance Th
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147 5.1.1 Microstructure of B-Cr-Fe
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149 As mention above, the coating t
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151 Atomic size: 1.241A Crystal str
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153 Coating thickne, (Mean): 84.24
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155 Due to the atomic size, substit
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157 5.3 Microhardness In bo
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159 5.4 Corrosion Resistance In thi
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161 5.5 Oxidation Resistance In one
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Figure 5.7 The comparison of oxidat
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165 For transition metals Group IVB
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APPENDIX A PHASE DIAGRAMS The binar
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Figure A.3 Phase diagrams in B-Mo-F
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Figure A.5 Phase diagrams in B-Nb-F
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Figure A.7 Phase diagrams in B-Ti-F
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Figure A.9 Phase diagrams in B-Hf-F
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177 Name and formula Reference code
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Name and formula Reference code: 04
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195 15. Selçuka, B., Tpekb, R., Ka
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197 41. Ueda, N., Mizukoshi, T., De
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199 67. Davis, J. A., Wilbur, P. J.
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201 90. Uzunov, N., Ivanov, R. (200
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203 114. Jayaraman, S., Gerbi, J. E
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Multi-component boron coatings on low carbon steel AISI 1018

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