INFLUENCE OF PROCESSING METHOD ON THE MICROSTRUCTURE AND MECHANICAL. PROPERTIES OF MULLITE/ZrO, COMPOSITES. P. MIRANZO.
JOURNAL DE PHYSIQUE Colloque C1, supplement au n 0 2 , Tome 47, f h v r i e r 1986
page c1-417
INFLUENCE OF PROCESSING METHOD ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF MULLITE/ZrO, COMPOSITES
P.
M.I.
MIRANZO.
OSENDI and J.S.
MOYA
Institute d e ergm mica y V i d r i o , C.S.I.C., Km 24.3 C t r a . , Madrid-Valencia, Arganda d e l Rey, Madrid, S p a i n
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Resum6 Des m a t e r i a u x c o m p o s i t e s M u l l i t e / Z r O n o n t 6 t & p r e p a r g s p a r d e w mgthodes d i f f g r e n t e s : f r i t t a g e e t f r i t t a g e r g a c t i f . Les p r o p r i g t g s mgcaniques e t l e s mecanismes de t e n a c i t g d e s deux comp o s i t e s ont 6 t 6 analysgs s u r l a basedeconsid6rationsmicrostructurales. A b s tr a c t - M u l l i t e / Z r 0 2 c o m p o s i t e s have been p r e p a r e d b y two d i f f e r e n t methods: s i n t e r i n g and r e a c t i o n s i n t e r i n g . The mechanical p r o p e r t i e s and toughening mechanisms of b o t h c o m p o s i t e s a r e anal i z e d on t h e b a s i s o f m i c r o s t r u c t u r a l c o n s i d e r a t i o n s .
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INTRODUCTION
High t e c h n o l o g y m u l l i t e / Z r 0 2 c o m p o s i t e s have c r e a t e d a g r e a t d e a l of i n t e r e s t due t o t h e i r p o t e n t i a l t e c h n i c a l a p p l i c a t i o n s . T o p r o d u c e t h e s e m a t e r i a l s two d i f f e r e n t p r o c e s s e s have been f o l l o w e d i n t h e p r e s e n t work: i ) S i n t e r i n g o f m u l l i t e p r e c u r s o r ( p r e m u l l i t e ) and z i r c o n i a pow d e r s ( t h i s sample w i l l be named MZI), ii) r e a c t i o n s i n t e r i n g o f ZrSiOb and A l 2 O 3 powders (MZ2 sample) i n s t o i c h i o m e t r i c p r o p o r t i o n s a c c o r d i n g t o t h e equation: 2ZrSiO,,
