第3期 AO3(YAG)LaPO4层状陶瓷复合材料研究 167 [3]LU H, HSU SM. Fracture behavor of multilayer silicon nr [7 PA TERAS S K, HOWARD SJ, CL YNE TW. The contribu- tride/bo on nitride ceram ics[J]. J Am Ceram Soc, 1996, 79 on of bridging ligament rup ture t energy absor ton during (9):2452-2457 frac ture of metal-ceram ic lam nates[J Key Eng Mater [4 KOVAR D, THOULESS M D, HALLORAN J W Crack de- 1997,127-131:1127-1136 flecton and p opagaton in layered sil icon nitride/boon nr [8 SHERMAN D. The mechan ical behavir of layered brazed de ceram ics[J] J Am Ceram Soc, 1998, 81(4): 1004 metal/ ceram posites[J Mater Lett, 1998, 33: 255 1012 [5 YAROSHENKO V, ORLOV YA N, et al Lam inar [9]SHAW M C ire mode of ceram ic/metal multilay. Si N,"TN hotp ossed ceram ic camposites[J] Key Eng ers ole of the interface[J). Key Eng Mater, 1996, 116- Mater,1997,132-136:2017-2020 117:261·278 [6 MARSHALL DB, RATIO J J Enhanced fracture toughness [10]CAO H C, EVANS A G On crack extensin in ductile/ in layered m icDcamposites of Ce"Zo2 and ALO,[J. J lam inates[J. Acta Metall Mater, 1991, 39(12) Am Ceram Soc,1991,74(12):2979-2987 3005 Prepara tion of Ak O3(YAG) /La pO4 Lam ia ted Ceram ics Com posites TONG J ian-feng CHEN Dam ing, L U Xiao-guang, L I B aowei Beijing Institute of eonauticalMaterials, Beijing 100095, China) Abstract: h the present work, aqueous ge lcasting-hot pressing technique b prepare oxide matrix lam inated ceram ic camposites by using ALO,( YAG) as matrix layers and Lapo as interfac ial layers The camposites with about 110um matrix layers and 10Wm inter fac ial layers were prepared The effects of content LaRO and procedure parameters of hotp ressing on properties of oxide matrix lamr nated ceram ic camposites were investigated The results show that the bend ing strength of oxide matrix lam inated ceram ics decreases a ittle, while the frac ture bughness of as"p repared camposites is made much mp rovement The maximal apparent fracture toughness of the oxide lam nated ceram ic composites is 13 52MPa.m, which is three tmes overmatrix camposites The differences of the cracks trend beteen the oxide matrix lam inated ceram ic and matrix materials were compared in detail Key words: alum ina, yttrim alum nium gamet phosphoric ac i lanthanum; lam inated ceram ic; composites 201994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreservedhttp://www.cnki.net第 3期 A l2O3 ( YAG) /LaPO4 层状陶瓷复合材料研究 [ 3 ] L IU H, HSU SM. Fracture behavior ofmultilayer silicon ni2 tride /boron nitride ceramics[J ]. J Am Ceram Soc, 1996, 79 (9) : 2452 - 2457. [ 4 ] KOVAR D, THOULESSM D, HALLORAN J W. Crack de2 flection and p ropagation in layered silicon nitride /boron ni2 tride ceramics[J ]. J Am Ceram Soc, 1998, 81 ( 4) : 1004 - 1012. [ 5 ] YAROSHENKO V, ORLOVSKAYA N, et al. Lam inar Si3N4 2TiN hot2p rossed ceramic composites [ J ]. Key Eng Mater, 1997, 1322136: 2017 - 2020. [ 6 ] MARSHALL D B, RATTO J J. Enhanced fracture toughness in layered microcomposites of Ce2ZrO2 and A l2O3 [ J ]. J Am Ceram Soc, 1991, 74 (12) : 2979 - 2987. [ 7 ] PATERAS S K, HOWARD S J, CLYNE TW. The contribu2 tion of bridging ligament rup ture to energy absorp tion during fracture of metal2ceramic lam inates[ J ]. Key Eng Mater, 1997, 1272131: 1127 - 1136. [ 8 ] SHERMAN D. The mechanical behavior of layered brazed metal/ ceramic composites[J ]. Mater Lett, 1998, 33: 255 - 260. [ 9 ] SHAW M C. The fracture mode of ceram ic /metal multilay2 ers: role of the interface [ J ]. Key Eng Mater, 1996, 1162 117: 261 - 278. [ 10 ] CAO H C, EVANS A G. On crack extension in ductile / brittle lam inates[ J ]. Acta Metall Mater, 1991, 39 ( 12) : 2997 - 3005. Preparation of Al2 O3 ( YAG) /LaPO4 Lam inated Ceram ics Composites TONG Jian2feng, CHEN Da2m ing, L IU Xiao2guang, L IBao2wei (Beijing Institute of AeronauticalMaterials, Beijing 100095, China) Abstract: In the p resent work, aqueous gelcasting2hot p ressing technique to p repare oxide matrix laminated ceramic composites by using A l2O3 (YAG) as matrix layers and LaPO4 as interfacial layers. The composites with about 110μm matrix layers and 10μm inter2 facial layers were p repared. The effects of content LaPO4 and p rocedure parameters of hot2p ressing on p roperties of oxide matrix lam i2 nated ceramic composites were investigated. The results show that the bending strength of oxide matrix lam inated ceramics decreases a little, while the fracture toughness of as2p repared composites is made much imp rovement. The maximal apparent fracture toughness of the oxide lam inated ceram ic composites is 13. 52MPa·m 1 /2 , which is three times overmatrix composites. The differences of the cracks trend between the oxide matrix lam inated ceram ic and matrix materials were compared in detail. Key words: alum ina; yttrium alum inium garnet; phosphoric acid lanthanum; laminated ceram ic; composites 167