·382· 北京科技大学学报 1996年No.4 参考文献 I Clegg W J,Kendall K.A Simple Way to Make Tough Ceramics.Nature,1990,347:455 ~457 2 Lange F F.Trannsformation Toughening.J Mater Sci,1982,17:255~262 3 Witek S R,Butler E P.Zirconia Partical Coarsening and the Effects of Zirconia Additions on the Mechanical Properties of Certain Commercial Aluminias.J Am Ceram Soc,1986,69(7):523~529 4 Lange FF,Hirlinger MM.Hindrance of Grain Growth in Al,O,by ZrOzInclusions.J Am Ceram Soc,1984,67(3):164~168 5刘康时，陶瓷工艺学原理.广州：华南工学院出版社，1990.344~345 Structure and Mechanical Properties of ZrO, Toughened Al,O,Ceramic Meng Xianmei Shang Chengjia Zhi Rentao Department of Material Physics,USTB,Beijing 100083,PRC ABSTRACT Y2 O,stabilized ZrO,toughened nanometer Al,O,,HmAl,O,ceramic composites are obtained with a high-shear two-roll mill process.Their structure and mechanical properties are studied respectively.Further more,the microstructure of these ceramic composites was designed through mixing three grain-size powders.A fine ceramic composites of ZrO,/nmAl,O,/umAl,O,is obtained.This ceramic composites can be densified above 98%of theoretical at 1550 C.Its flexual strengh and toughness are fine. KEY WORDS special ceramic,Alumina,Zirconia,toughness/high-shear tow-roll mill process 米絲米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米米 (上接369页) Computer Aided Design of Refractory Mold Xu Yaochang Zhang Zhenyi Department of Computer,USTB,Beijing 100083 ABSTRACT The Computer Aided Design of refractory mold,which is realized under the condition of visualization using CAD technique was presented.Also,three features of visualization technique were descripted.It has been shown that visualization technique can provide a good designing condition,minimize developing period and improve the designing quality. KEY WORDS visualization,CAD,mold. 3 8 2 . 北 京 科 技 大 学 学 报 19 9 6年 N o . 4 参 考 文 献 1 C l e g g W J , K e n d a ll K . A Si m P l e W a y t o M ak e T o u g h C e r am i e s . N a ut r e , 19 9 0 , 3 4 7 : 4 5 5 一 4 5 7 2 L a n g e F F . T r a n s fo mr a t i o n T o u g h e n i n g . J M a t e r S e i , 1 9 8 2 , 1 7 : 2 5 5 ~ 2 6 2 3 W i t e k S R , B u t l e r E P . Z icr o n i a P art i e a l C o a sr e n i n g an d ht e E fe e t s o f Z icr o n i a A d di ti o n s o n ht e M e e h a n i e a l P r o P e rt i e s o f C e art i n C o r n r 以 e r e i a l A l u m i n i a s . J A m C e ar m S o e , 1 9 8 6 , 6 9 ( 7 ) : 5 2 3 一 5 2 9 4 L a n g e C e r a m F F , H i r l in g e r M M . H i n dr a n c e o f G ar i n G r o w th in A 1 2 0 3 b y z fO Z I n c l u s i o n s · 5 刘康 时 S o e , 1 9 8 4 , 6 7 ( 3 ) : 16 4 一 16 8 . 陶瓷工艺学原理 . 广州 : 华南工 学院 出版社 , 19 9 0 . 3 4 ~ 3 45 S t ru e tu r e a n d M e e h a n i c a l p r o p e rt i e s o f z r O Z T o u g h e n e d A 1 2O 3 C e r a m i c 材已n g iX a n m e i hS a n g hC e n 舒ia hZ i R e n at o D e P art m e n t o f M a t e r i a l P h y s i c s , U S T B , B e ij i n g 100 0 8 3 , P R C A B S T R A C T Y Z O : s at b i li z e d Z 心 2 t o u g h e n e d l a n 0 1l l e t e f A 1 2 0 3 r a 们n l C c o m P o s l t e s m e C h a n i C a l ar e o b at i n e d w i t h a h i g h 一 s h e a r tw o 一 r o ll P f 0 C e S S · , 卜m A T h e i r P r o P e rt l e s ar e s ut d i e d r e s P e e t i v e ly . m ill F u rt h e r t h C m i C f 0 S t r U C ut T C ht e s e e e r a m i e e o m P o s it e s w a s d e s i g n e d t h r o u g h m i x i n g th r e e g r a i n 一 s i z e A a n d o f if l C C e f a l l l l C e o m p o s it e s o f Z Or Z / n n 1A 1 2 O 3 /“ m A 1 2 o 3 a b o v e 9 8% o f t h e o r e t i e a l a t 1 5 5 0 ℃ . 1 5 o b at i n e d . T h i s e e r a m i C P o w d e r s . c o m P 0 s l t e s e a n b e d C fl s iif C d It s fl e x u a l s tr e n g h a n d t o u g hnL e s s a r e if n e . K E Y W O R D S Por c e s s s P e e i a l e e r am i e A l u m i n a , Z ier o n i a , t o u g h n e s s爪i g h 一 s h e a r t o w 一 r o ll m ill (上 接 3 6 9 页 ) C o m P u t e r A i d e d D e s i g n o f R e fr a e t o yr M o l d 曰 Y晚 D e P art m e n t aY o c h a n g hZ a n g hZ e ny i o f C o m P u t e r , U S T B , B e 巧i n g 10 0 0 8 3 A B S T R A C T T h e C o m P u t e r A id e d D e s i g n o f r e fr a e t o ry m o l d , w h i e h 1 5 r e a li z e d u n d e r t h e e o n d i t i o n o f v i s u a li z a t i o n u s i n g C A D t e e h n i q u e w a s P r e s e n t e d . A l s o , t h r e e fe a ut r e s o f v i s u a li z a t i o n t e e h n iq u e w e r e d e s e r iPt e d . It h a s b e e n s h o w n th a t v i s u a li z a t i o n t e e h n i q u e e a n P r o v i d e a g o o d d e s i g n i n g c o n d it i o n , m i n im i z e d e v e l o Pi n g P e ir o d an d im P r o v e t h e d e s i g n i n g q u a liyt . K E Y W O R D S v i s u a li z a t i o n , C A D , m o l d