高温N_2气氛下树脂结合刚玉材料中阿隆相的形成机制
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摘要
以酚醛树脂为结合剂,分别以100wt%烧结刚玉细粉、100wt%电熔刚玉细粉和50wt%烧结刚玉加50wt%电熔刚玉混合细粉为原料制备试样,试样在N2气氛下经1 500℃和1 600℃烧成,对烧后试样进行XRD、SEM和EDAS表征分析。结果表明:1 500℃烧后试样中生成了γ-AlON(Al5O6N)和12H多型体(Al6O3N4),1 600℃烧后试样中生成了γ-AlON(Al5O6N)、21R多型体(Al7O3N5)和16H多型体(Al8O3N6)。1 600℃烧成试样中生成的阿隆(AlON)含量较1 500℃烧成试样显著增多。在相同温度下,50wt%烧结刚玉加50wt%电熔刚玉混合细粉试样中生成的AlON含量最多,100wt%电熔刚玉细粉试样次之,100%烧结刚玉细粉试样中生成的AlON含量最少。分析了AlON的形成机制并建立了刚玉细粉与碳的反应模型。
Using phenolic resin as binding agent,samples with sintered alumina(100 wt%),fused corundum(100 wt%)and sintered alumina(50 wt%)mixed with fused corundum(50 wt%)were prepared,respectively,then the samples were sintered at 1 500℃and 1 600℃ under flowing nitrogen,respectively.Sintered samples were characterized by XRD,SEM and EDAS.The results show thatγ-AlON(Al5 O6 N)and 12 Hpolytype(Al6 O3 N4)form in samples sintered at 1 500℃,whileγ-AlON(Al5 O6 N),21 Rpolytype(Al7 O3 N5)and 16 Hpolytype(Al8 O3 N6)form in samples sintered at 1 600℃.The content of AlON increases remarkably in samples sintered at 1 600℃compared with samples sintered at 1 500℃.At the same sintering temperature,AlON contents in samples prepared with sintered alumina(50 wt%)mixed with fused corundum(50 wt%),fused corundum(100 wt%)and sintered alumina(100 wt%)decrease inturn.The formation mechanism of AlON was studied and the reaction model of alumina powder and carbonis was presented.
Using phenolic resin as binding agent,samples with sintered alumina(100 wt%),fused corundum(100 wt%)and sintered alumina(50 wt%)mixed with fused corundum(50 wt%)were prepared,respectively,then the samples were sintered at 1 500℃and 1 600℃ under flowing nitrogen,respectively.Sintered samples were characterized by XRD,SEM and EDAS.The results show thatγ-AlON(Al5 O6 N)and 12 Hpolytype(Al6 O3 N4)form in samples sintered at 1 500℃,whileγ-AlON(Al5 O6 N),21 Rpolytype(Al7 O3 N5)and 16 Hpolytype(Al8 O3 N6)form in samples sintered at 1 600℃.The content of AlON increases remarkably in samples sintered at 1 600℃compared with samples sintered at 1 500℃.At the same sintering temperature,AlON contents in samples prepared with sintered alumina(50 wt%)mixed with fused corundum(50 wt%),fused corundum(100 wt%)and sintered alumina(100 wt%)decrease inturn.The formation mechanism of AlON was studied and the reaction model of alumina powder and carbonis was presented.
引文
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[16] MCCAULEY J W,CORBIN N D.Phase relations and reaction sintering of transparent cubic aluminum oxynitride spinel(ALON)[J].Journal of the American Ceramic Society,1979,62(9-10):476-479.
[17] PASCO W D,DOREMUS B H.Carbothermic reduction of alumina Part II:Thermochemistry.No.82CRD111[R].General Electric Co.,1982-03.
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[19] LEFORT P, BILLY M. Mechanism of AlN formation through the carbothermal reduction of Al2O3in a flowing N2atmosphere[J].Journal of the American Ceramic Society,1993,76(9):2295-2299.
[20] BALOMENOS E,PANIAS D,PASPALIARIS I.Theoretical investigation of the volatilization phenomena occurring in the carbothermic reduction of alumina[J].World of Metallurgy-Erzmetall,2011,64(6):312-320.
[21] LIHRMANN J M.Thermodynamics of the Al2O3-Al4C3system:III.Equilibrium vapor pressures and activation energies for volatilization[J].Journal of the European Ceramic Society,2008,28(3):649-656.
[2]宋希文,章军,郭贵宝.Al2O3-C耐火材料的性能研究[J].包头钢铁学院学报,2000,19(2):111-114.SONG Xiwen,ZHANG Jun,GUO Guibao,et al.Study on the properties of Al2O3-C materials[J].Journal of Baotou University of Iron and Steel Technology,2000,19(2):111-114(in Chinese).
[3] MCCAULEY J W,PATEL P,CHEN M,et al.AlON:A brief history of its emergence and evolution[J].Journal of the European Ceramic Society,2009,29(2):223-236.
[4] CORBIN N D.Aluminum oxynitride spinel:A review[J].Journal of the European Ceramic Society,1989,5(3):143-154.
[5] WILLEMS H X,HENDRIX M R M,METSELAAR R,et al.Thermodynamics of AlON I:Stability at lower temperatures[J].Journal of the European ceramic society,1992,10(4):327-337.
[6] ZHANG N,LIANG B,WANG X Y,et al.The pressureless sintering and mechanical properties of AlON ceramic[J].Materials Science and Engineering:A,2011,528(19):6259-6262.
[7] YAMAGUCHI G,YANAGIDA H.Study on the reductive spinel—A new spinel formula AlN-Al2O3instead of the previous one Al3O4[J].Bulletin of the Chemical Society of Japan,1959,32(11):1264-1265.
[8] MCCAULEY J W,CORBIN N D.High temperature reactions and microstructures in the Al2O3-AlN system[M]//Progress in Nitrogen Ceramics. Netherlands:Springer,1983:111-118.
[9] LIU X J,CHEN F,ZHANG F,et al.Hard transparent AlON ceramic for visible/IR windows[J].International Journal of Refractory Metals and Hard Materials,2013,39:38-43.
[10] RAFANIELLO W,CUTLER I B.Preparation of sinterable cubic aluminum oxynitride by the carbothermal nitridation of aluminum oxide[J].Journal of the American Ceramic Society,1982,13(3):128-128-c-128.
[11] YUAN X,LIU X,ZHANG F,et al.Synthesis ofγ-AlON powders by a combinational method of carbothermal reduction and solid-state reaction[J].Journal of the American Ceramic Society,2010,93(1):22-24.
[12] JIN X,GAO L,SUN J,et al.Highly transparent AlON pressurelessly sintered from powder synthesized by a novel carbothermal nitridation method[J].Journal of the American Ceramic Society,2012,95(9):2801-2807.
[13] COLLONGU.R,COLIN F,THERY J.Reduction and nitridation reactions in alumina-based ceramics[J].Bulletin de la Societe Francaise de Ceramique,1967,77:51.
[14] DAIMU M.Properties of monolithic refractories used sintered alumina and fused alumina[J].Refractory,2016,68(2):60-66.
[15] QIN Haixia,LI Yong,JIANG Peng,et al.In-situ synthesis of AlON reinforcing phases in resin bonded Al2O3composite materials[J].Journal of Alloys and Compounds,2017,711:1-7.
[16] MCCAULEY J W,CORBIN N D.Phase relations and reaction sintering of transparent cubic aluminum oxynitride spinel(ALON)[J].Journal of the American Ceramic Society,1979,62(9-10):476-479.
[17] PASCO W D,DOREMUS B H.Carbothermic reduction of alumina Part II:Thermochemistry.No.82CRD111[R].General Electric Co.,1982-03.
[18] FRUEHAN R J,LI Y,CARKIN G.Mechanism and rate of reaction of Al2O,Al,and CO vapors with carbon[J].Metallurgical and Materials Transactions B,2004,35(4):617-623.
[19] LEFORT P, BILLY M. Mechanism of AlN formation through the carbothermal reduction of Al2O3in a flowing N2atmosphere[J].Journal of the American Ceramic Society,1993,76(9):2295-2299.
[20] BALOMENOS E,PANIAS D,PASPALIARIS I.Theoretical investigation of the volatilization phenomena occurring in the carbothermic reduction of alumina[J].World of Metallurgy-Erzmetall,2011,64(6):312-320.
[21] LIHRMANN J M.Thermodynamics of the Al2O3-Al4C3system:III.Equilibrium vapor pressures and activation energies for volatilization[J].Journal of the European Ceramic Society,2008,28(3):649-656.
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