Characterization and control of the fiber-matrix interface in ceramic ...

More documents

Recommendations

Info

I F Figure 10.17. SEM micrographs of the fracture surfaces of specimens containing Nicalon fibers with a carbon intermediate layer: (8) and (b) as fabricated and (c) and (d) after heating to 1125 K for 44 hours in flowing oxygen.
io0 I I I I CVI- 172 75 - - 0 z v - - I Figure 10.18. Load-displacement curves and fracture sur€aces of specimens fabricated from Nicalon fibers coated with boron-containing intermediate layers prior to infiltration: (a) elemental boron and (b) boron nitride from diborane and ammonia.
Page 3:
ORNL/TM-11039 Metals and Ceramics D
Page 6 and 7:
Page 9.3 Composite Fabrication . .
Page 9:
LIST OF TABLES Table Page 5,l. Prop
Page 12 and 13:
Figure 8.3. 9.1.. 9.2. 9.3. 9.4. 9.
Page 14 and 15:
Figure 10.18. 10.19. 10.20. 10. 21.
Page 17 and 18:
ACKNOWLEDGMENTS The author wishes t
Page 19 and 20:
CWCTERIZATION AND CONTROL OF THE FI
Page 21:
1. INTRODUCTION During the last sev
Page 24 and 25:
The development of low-density, hig
Page 27 and 28:
3. FABRICATION TECHNIQUES 3.1 Intro
Page 29 and 30:
11 isostatic pressing (HIP), can be
Page 31:
13 utilizing the comparatively low-
Page 34 and 35:
16 ORN L- DWG 85- 4 i 4 18RS HEAT1
Page 37 and 38:
5. COMPOSITE DESIGN 5.1 Introductio
Page 39 and 40:
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 and 92:
73 further protection. A 6.5-cm-dia
Page 94 and 95:
76 of the specimen slowly decreased
Page 96 and 97: 78 The programmer is also equipped
Page 98 and 99: 80 graphite holders through multipl
Page 100 and 101: 82 temperature by simply switching
Page 102 and 103: 84 ORNk DWG 87- 4494 3 METAL LOGR A
Page 104 and 105: 86 9.5 Fracture Surface Analvsis Th
Page 106 and 107: 88 treated and untreated halves wer
Page 108 and 109: 90 9.8.2 Tensile testinq In an init
Page 110 and 111: 92 ORNL-DUG 85-11767R.2 ? ! 2 f CEN
Page 112 and 113: 94 fracture of individual Nicalon f
Page 114: 96 Figure 10.1. SiC-infiltrated Nic
Page 117 and 118: 99 compared with the dimensions acq
Page 119 and 120: 101 Table 10.3. Strength and modulu
Page 121 and 122: 100 ORNL- DWG 87-1 6292 R CVI-I73 7
Page 123 and 124: BULK FIBER SAMPLE NO. 173: FIBER SU
Page 125 and 126: 107 similar samples show the film o
Page 127 and 128: Figure 10.7. SEM micrographs showin
Page 129 and 130: 111 Table 10.4. Thermochemical eval
Page 131 and 132: 100 ORNL-DUG 87-15969R CVI- 170 75
Page 133 and 134: 115 Analysis conversion of of the m
Page 135 and 136: 117 A 1 I S N 31 N I I'd I LN 3H 3
Page 137 and 138: 119 n 0 W n 9 v P n w- n v
Page 139 and 140: 121 s m f c I m z - Ir 2 a 0 9 In u
Page 141 and 142: Figure 10.14. SEM micrographs of in
Page 143 and 144: J ORNL-DWC 88-6289 z cF u) w I- z O
Page 145: 127 300 I CVI-480 I I 1 0 R N L-DWG
Page 149 and 150: 131 RAL 033021 RAL 033023 Figure 10
Page 151: 133 include: the reaction of boron
Page 154 and 155: 136 that BN coatings react with the
Page 156 and 157: 75 7 ORNL-DWG 87-48234 50 - - c5 z
Page 158 and 159: 140 Table 10.9. Thermochemical eval
Page 160 and 161: OANL-bwo 88-9025 ORNL-DWG 66-9027 I
Page 162 and 163: 144 uncoated tows were 14 k 2 pm; t
Page 165 and 166: 11. DISCUSSION 11.1 Constituent Pro
Page 167 and 168: 149 The properties of CVD Sic have
Page 169 and 170: 151 11.2.1 Matrix cracking In the N
Page 171 and 172: 153 OWL-DWG 88-10677 CVI- (78 22 I
Page 173 and 174: 155 Table 11.3. Property comparison
Page 175 and 176: 157 a f ““f f- L c I Figure 11.
Page 177 and 178: 159
Page 179 and 180: 161 The equations demonstrate that
Page 181 and 182: 163 calculations of the matrix depo
Page 183 and 184: 165 In four of the samples, the fib
Page 185 and 186: 167 Table 11.4. Properties of glass
Page 187 and 188: 169 rare-earth magnets and coils to
Page 189 and 190: 171 stress fields along the fiber i
Page 191 and 192: 173 11.3.2 Tensile testinp, The use
Page 193 and 194: 17 5 contraction have been ignored,
Page 195: 177 the system, and when the result
Page 198 and 199:
180 reduces fiber strength. The str
Page 200 and 201:
182 15. R. A. J. Sambell, D. H. Bow
Page 202 and 203:
184 41. A. J. Caputo et al., "Fiber
Page 204 and 205:
186 71, N. F. DOW, Study of Stresse
Page 206 and 207:
188 98. M. H. Rawlins et al., "Inte
Page 208 and 209:
190 125. R. Warren and C-H. Anderss
Page 210 and 211:
192 155. M. F. Doerner and W, D. Ni
Page 213 and 214:
APPENDIX A. AUGER ELECTRON SPECTROS
Page 215:
APPENDIX B DETAILS OF THE FIBER-SHE
Page 218 and 219:
200 Those for the fiber (primed) ar
Page 220 and 221:
202 89-92. 93. 94. 95" 96. 97. 98-9
Page 222 and 223:
204 130-133. E. I. DUPONT DE NEMOUR
Page 224 and 225:
206 173. NATIONAL ACADEMY OF SCIENC
Page 226 and 227:
208 203 - 204. 20s. 206 - 207. 208.
show all

Characterization and control of the fiber-matrix interface in ceramic ...

Create successful ePaper yourself

Delete template?

Save as template?