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

155
Table 11.3. Property comparison in the Nicalon-Sic system.
Fiber
Theoretical Flexure Flexure
Sample content density density strength modulus
No. (wt %> (g/c1n 3 ) (MPa) (GPa)
Measured V a l .
170 41.8
2 .3 51-0.03
80.9k1 .O
88.0k8.0
120.7217.9
171 42.1
2.3220.04
79.8k1.4
388.8-t-14.6
137.2k20.7
172 41.3
2.3540.03
80.7-t-1 .O
107.7k13.2
119.3226.2
173 39.0
2.31k0.02
79.350.7
8O.Ot-10.3
129.0k21.4
174 41.8
2.4240.03
83.1k1.0
389.7k13.4
163.4215.9
175 43.5
2.25kO. 04
77.53-0.5
261.8kLc0.6
147.6k9.0
176 42.0
2. [+4-t-0.03
84.121.0
91.254.1
122.1k2.8
177 40.4
2.3OkO ~ 06
79,122.0
113.9k19.5
150.3k22.8
178 40.3
2.3420.06
80.4k0.9
81.9kl.O. 1
160.0k21.4
179 41.3
2.17k0.04
.74.441.2
57.2-t-11.5
140.7k33.1
180 42.9
(unox id i z e d)
180 42.9
(oxidized)
2.40k0.14
2.37k0.15
82.424.7
81.6k5.3
380.2433,4
188.5k17.0
103.4k13.1
114.5k3.4
Predicted Values
Fully 40
dense
2.95
100
500
220
80% dense 40
2.31
80
500
160
No fiber 40
contribution
2.31
80
200
160
No fiber 40
contribution
(20% porosity)
2.31
80
90
110
Fibers as 40
pores
(60% porosity)
2.31
80
75
55