.138 北京科技大学学报 第29卷 参考文献 [1]李湘洲.多孔陶瓷及其在治金工业中的应用.金属世界，2005 (3):50 [2]朱新文，江东亮，谭寿洪，多孔陶瓷的制备、性能及应用.陶瓷 学报，2003,24(2)：85 [3]钱军民，崔凯，艾好，等.多孔陶瓷制备技术研究进展。兵器材 料科学与工程，2005,28(5)：60 [4]Yoshihisa S,Keisuke T.Evaluation of fracture toughness of porous ceramics.Int J.2003,46(1):30 [5]Chen C H.Takita K,Honda S,et al.Fracture behavior of cylin- drical porous alumina with pore gradient.J Eur Ceram Soc. 图61600℃铝质量分数为16%的支撑体SEM照片 2005,25(4):385 Fig-6 SEM of support calcined at 1600C with 16%Al powder [6]Chen C H.Saw ao H,Hideo A.Fracture behavior and microstruc ture of the porous alumina tube.Ceram Eng Sci Proc,2005.26 (8):61 3结论 [7]Sig S L.Mataga P A.Dalgleish B J.et al.On the Toughness of (1)热处理温度对金属AI增韧氧化铝多孔陶 brittle materials with a ductile phase.Acta Metall Mater.1988. 36(4):945 瓷支撑体的断裂韧性影响很大，当热处理温度为 [8]郝春成，崔作林，尹衍升，等.颗粒增韧陶瓷的研究进展.材 800℃，金属韧性相对支撑体断裂韧性的提高贡献 料导报.2002,16(2)：28 很大；当热处理温度高于1200℃时，铝因氧化膨胀 [9]Flinn B.Ruhle M,Evans A G.Toughening in composites of 而产生微裂纹对支撑体的断裂韧性提高也有一定的 Al2O3 reinforced with Al.Acta Metall.1989.37(4):3001 [10]Peng L M.Cao J W.Noda K.et al.Mechanical properties of 作用， ceramic metal composites by pressure infiltration of metal into (2)1600℃热处理后的支撑体性能最好，当金 porous ceramics.Mater Sci Eng A.1995.374(1/2):1 属铝质量分数为16%时，支撑体的断裂韧性和弯曲 [11]Priellip H.Knechtel M,Claussen N,et al.Strength and frac 强度分别为2.0MPam/和137MPa ture toughness of aluminum/alumina composites with interpene- trating networks.Mater Sci Eng A.1995,197(1):19 Effects of heating temperature on the fracture toughness of macroporous alumina supports added Al powder LI Gaiye,QI Hong,FAN Yiqun,XU Nanping Membrane Science Technology Research Center,Key Laboratory of Materialoriented Chemical Engineering of Jiangsu Province,Nanjing University of Technology Nanjing 210009.China ABSTRACI An amount of Al powder was added to toughen Al2O3 porous supports by dry press forming. Based on the toughening mechanism of Al2O3/Al composite,the effects of heating temperature on the fracture toughness and bending strength of macroporous Al2O3/Al supports were investigated in detail,and the mi- crostructure of specimens made of the supports was analyzed by SEM.The results show that the fracture tough- ness of the supports is influenced by calcining temperature.When the calcining temperature is low,unoxidized Al phase can absorb amount of fracture energy to make the fracture toughness of the supports high.But when the temperature is above 1200C,the cracks which is occurred in the oxidation processing of Al phase can im- prove the fracture toughness of the supports,and the contribution of cracks is more important than the amount of Al phase to the fracture toughness of supports. KEY WORDS porous ceramic membrane;supports;metal Al;fracture toughness:dry press forming图6 1600℃铝质量分数为16％的支撑体 SEM 照片 Fig．6 SEM of support calcined at1600℃ with16％ Al powder 3 结论 （1） 热处理温度对金属 Al 增韧氧化铝多孔陶 瓷支撑体的断裂韧性影响很大‚当热处理温度为 800℃‚金属韧性相对支撑体断裂韧性的提高贡献 很大；当热处理温度高于1200℃时‚铝因氧化膨胀 而产生微裂纹对支撑体的断裂韧性提高也有一定的 作用． （2）1600℃热处理后的支撑体性能最好‚当金 属铝质量分数为16％时‚支撑体的断裂韧性和弯曲 强度分别为2∙0MPa·m 1／2和137MPa． 参 考 文 献 ［1］ 李湘洲．多孔陶瓷及其在冶金工业中的应用．金属世界‚2005 （3）：50 ［2］ 朱新文‚江东亮‚谭寿洪．多孔陶瓷的制备、性能及应用．陶瓷 学报‚2003‚24（2）：85 ［3］ 钱军民‚崔凯‚艾好‚等．多孔陶瓷制备技术研究进展．兵器材 料科学与工程‚2005‚28（5）：60 ［4］ Yoshihisa S‚Keisuke T．Evaluation of fracture toughness of porous ceramics．Int J‚2003‚46（1）：30 ［5］ Chen C H‚Takita K‚Honda S‚et al．Fracture behavior of cylin￾drical porous alumina with pore gradient．J Eur Ceram Soc‚ 2005‚25（4）：385 ［6］ Chen C H‚Sawao H‚Hideo A．Fracture behavior and microstruc￾ture of the porous alumina tube．Ceram Eng Sci Proc‚2005‚26 （8）：61 ［7］ Sig S L‚Mataga P A‚Dalgleish B J‚et al．On the Toughness of brittle materials with a ductile phase．Acta Metall Mater‚1988‚ 36（4）：945 ［8］ 郝春成‚崔作林‚尹衍升‚等．颗粒增韧陶瓷的研究进展．材 料导报‚2002‚16（2）：28 ［9］ Flinn B‚Ruhle M‚Evans A G．Toughening in composites of Al2O3reinforced with Al．Acta Metall‚1989‚37（4）：3001 ［10］ Peng L M‚Cao J W‚Noda K‚et al．Mechanical properties of ceramic-metal composites by pressure infiltration of metal into porous ceramics．Mater Sci Eng A‚1995‚374（1／2）：1 ［11］ Priellip H‚Knechtel M‚Claussen N‚et al．Strength and frac￾ture toughness of aluminum／alumina composites with interpene￾trating networks．Mater Sci Eng A‚1995‚197（1）：19 Effects of heating temperature on the fracture toughness of macroporous alumina supports added Al powder LI Gaiye‚QI Hong‚FA N Y iqun‚XU Nanping Membrane Science ＆ Technology Research Center‚Key Laboratory of Materia-l oriented Chemical Engineering of Jiangsu Province‚Nanjing University of Technology‚Nanjing210009‚China ABSTRACT An amount of Al powder was added to toughen Al2O3 porous supports by dry press forming． Based on the toughening mechanism of Al2O3／Al composite‚the effects of heating temperature on the fracture toughness and bending strength of macroporous Al2O3／Al supports were investigated in detail‚and the mi￾crostructure of specimens made of the supports was analyzed by SEM．The results show that the fracture tough￾ness of the supports is influenced by calcining temperature．When the calcining temperature is low‚unoxidized Al phase can absorb amount of fracture energy to make the fracture toughness of the supports high．But when the temperature is above1200℃‚the cracks which is occurred in the oxidation processing of Al phase can im￾prove the fracture toughness of the supports‚and the contribution of cracks is more important than the amount of Al phase to the fracture toughness of supports． KEY WORDS porous ceramic membrane；supports；metal Al；fracture toughness；dry press forming ·138· 北 京 科 技 大 学 学 报 第29卷