Page 336 - Engineered Interfaces in Fiber Reinforced Composites

Chapter 7. Improvement of transverse fracture toughness with interface control 317

-21 0
-5 .6 .7 .8 1) 1.0 1.1 1.2 1.3 1.4 1.5 1.6
Radial location. r/a
Fiber

350 r

i 1 1 1 1 1 I I I
.5 .6 .7 .8 .9 1.0 1.1 1.2 1.3 1.4 1.5 1.6
Radial location. rla
(b) -kJ- Rber interface Matrix

630 r

420
2
= 210
k
- 0
$
--
e
;
-210
a 420
.9 1.0 1.1 1.2 13 1A 1.5 1.6
.5 .6 .7 .8 Radial location. r/a
(c) Fiber Interface Matrix

Fig. 7.23. Thermal residual stress distributions in the (a) radial, (b) circumferential and (c) axial directions
for a SCS-6 SIC fiber/Ti3AI + Nb matrix composite with and without Cu, Nb and Cu/Nb coatings. Total
coating thickness flu = 0.1. After Arnold and Wilt (1992).