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ORNL/TM-11039 Metals and Ceramics D
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Page 9.3 Composite Fabrication . .
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LIST OF TABLES Table Page 5,l. Prop
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Figure 8.3. 9.1.. 9.2. 9.3. 9.4. 9.
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Figure 10.18. 10.19. 10.20. 10. 21.
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ACKNOWLEDGMENTS The author wishes t
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CWCTERIZATION AND CONTROL OF THE FI
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1. INTRODUCTION During the last sev
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The development of low-density, hig
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3. FABRICATION TECHNIQUES 3.1 Intro
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11 isostatic pressing (HIP), can be
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13 utilizing the comparatively low-
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16 ORN L- DWG 85- 4 i 4 18RS HEAT1
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5. COMPOSITE DESIGN 5.1 Introductio
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21 5,2 Mechanical Considerations Th
- Page 41 and 42: 23 GRNL-DWG 88-74 26 Figure 5.1. Th
- Page 43 and 44: 25 Equation (6) shows that the stre
- Page 45 and 46: 27 of reinforcement. There are two
- Page 47 and 48: 29 in strength. Conversely, the fib
- Page 49 and 50: -I_- Table 5.2. Thermally induced a
- Page 51 and 52: 33 1.2 ID 0.8 ;.r 1 e fi v 0.6 a4 Q
- Page 53: 35 will affect the interface and, t
- Page 56 and 57: 38 fiber-matrix bonding; thus, a fu
- Page 58 and 59: 40 In the analysis of the mechanica
- Page 60 and 61: 42 1.2 I .o .6 - E f aa '3 0.6 cn 3
- Page 62 and 63: 44 will result in the matrix being
- Page 64 and 65: I I MATRIX MATRIX Figure 7.1. Schem
- Page 66 and 67: 48 F = 2a2H, where H is the hardnes
- Page 68 and 69: 50 OWL-PHOTO 6866-86 i d c I 20pm F
- Page 70 and 71: 52 where Af is the surface area of
- Page 72 and 73: 54 Figure 7.4. Tensile and shear st
- Page 74 and 75: 56 I I I / -c rc -c / . Om / / I /
- Page 76 and 77: 58 ORNL-OWG 87-i 8234 F Figure 7.7.
- Page 78 and 79: coating and the distribution of she
- Page 80 and 81: 62 O m PHOTO 6676-87 i SIC FIBERS -
- Page 83 and 84: the composite, therefore an interme
- Page 85 and 86: methane as the reactant and is, thu
- Page 87 and 88: 9. EXPERIMENTAL PROCEDURES 9.1 Depo
- Page 89 and 90: 71 furnace. The furnace is, therefo
- Page 91: 73 further protection. A 6.5-cm-dia
- Page 95 and 96: 77 was not deoxygenated. Other gase
- Page 97 and 98: 79 Y201840 Y201841 Figure 9.5. Grap
- Page 99 and 100: 81 Table 9.1. Precoating processing
- Page 101 and 102: 83 9.4 Mechanical ProDerties 9.4.1
- Page 103 and 104: 85 true tensile strength of a compo
- Page 105 and 106: 87 .. h 8 o La z 4J u 4 k 4 4
- Page 107 and 108: 89 cut surface. This alignment is e
- Page 109 and 110: 91 YP5199 YP5200 *I Figure 9.8. Pho
- Page 111 and 112: 93 the cracks. In addition, if the
- Page 113 and 114: 10. RESULTS 10.1 ComDosite ProDerti
- Page 116 and 117: 98 Table 10.1. Property summary for
- Page 118 and 119: 100 Table 10.2. Interfacial frictio
- Page 120 and 121: , - - I e-, 75 ORNL-DWG 87-15948R C
- Page 122 and 123: I 104 I I 1 I rr) '0
- Page 124 and 125: OANL-DWC 88-6289 I I I I I I I I I
- Page 126 and 127: 108 A rl A r
- Page 128 and 129: 110 steps demonstrates that silicon
- Page 130 and 131: 112 t Figure 10.8. The presence of
- Page 132 and 133: 114 c Figure 10.10. SEM micrograph
- Page 134 and 135: 116 Table 10.5. Thermochemical eval
- Page 136 and 137: 118 microprobe was not equipped to
- Page 138 and 139: 350 300 CVI- 175 RAT. 175201 I 250
- Page 140 and 141: 122 (N) OVOl
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124 Table 10.6. Thermochemical eval
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126 predicted weight loss was 3%. T
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I F Figure 10.17. SEM micrographs o
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3 130 87 1 I I .C b Y --Q) -w -e -N
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132 Table 10.7. Thermochemical eval
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ORNL-OW 88-6289 ORNL-Dwc 88-6294 BU
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137 Table 10.8. Boron nitride coati
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139 RAL 102744 Figure 10.23. SEM mi
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141 infiltration by the preferred p
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143 YP 4971 YP 4970 Figure 10.25. C
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1 $1 0 *- QI 12 U 8 Pl 145 1 $1 0 T
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148 The resultant fibers are compos
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150 Table 11.1. Properties of Sic.
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152 Table 11.2. The influence of in
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154 11.2.2 Fracture stress and Youn
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156 ORNL-DWG 88-6276 MATRIX CRACKIN
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158 As previously discussed, the ul
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160 Fiber length becomes important
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162 upon matrix failure. This is th
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164 ORNL-DWG 88-747iR -10 -12 -4 4
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as-received fibers have a slightly
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168 throughout the composite sample
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170 SHEAR STRESS, T(MPo) 2 4 6 8 IO
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172 failure and extensive fiber pul
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174 Conversely, the individual Nica
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176 I 3D Figure 11.7. Stress blocks
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12. CONCLUSIONS AND mTTURE WORK Fab
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REFERENCES 1. A. H. Cotrell, "Stron
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183 31. J. C. Whithers, "Chemical V
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185 56. E. Ryskewitch, "Compressive
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187 85. J. F. Mandell, K. C. C. Hon
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Part I' 189 111. W. V. Kotlensky, "
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191 140. D. P. Stinton and W. J. La
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APPENDIX A AUGER ELECTRON SPECTROSC
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196 Table A-1. Auger spectral peaks
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APPENDIX B. DETAILS OF' THE FIBER-S
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QRNL/TM-11039 INTERNAL DISTRIBUTION
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203 109-110. BATTELLE COLUMBUS LABO
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205 150-152. LAJESXIDE CORPORATION,
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207 189. 190. 191. 192. 193. 194. 1
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209 218. DOE, OAK RIDGE OPERATIONS,