材料工程, 2017, 45(2): 46-53.
10.11868/j.issn.1001-4381.2015.000555
基于高温熔凝法Al2O3/ZrO2/YAG共晶陶瓷显微组织演变规律
付雪松
1,
,
孙胃涛
2,
,
韩文波
3,
,
李康
4,
,
陈国清
5,
,
周文龙
6,
1.大连理工大学材料科学与工程学院 ,辽宁大连,116085;
2.大连理工大学材料科学与工程学院 ,辽宁大连,116085;
3.哈尔滨工业大学特种环境复合材料技术国防科技重点实验室 ,哈尔滨,150080;
4.大连理工大学材料科学与工程学院 ,辽宁大连,116085;
5.大连理工大学材料科学与工程学院 ,辽宁大连,116085;
6.大连理工大学材料科学与工程学院 ,辽宁大连,116085
作为超高温结构材料,共晶氧化物陶瓷的力学性能和显微组织密切相关.采用高温熔凝法制备Al2O3/ZrO2/YAG共晶陶瓷体,研究熔体温度和结晶种子对凝固组织影响规律,运用经典形核机制和Jackson-Hunt共晶生长模型探讨了凝固组织的演变机理.研究表明,随着熔体温度升高(1750~2000℃),凝固体物相组成从α-Al2 O3,c-ZrO2和YAG转变为α-Al2O3,c-ZrO2和亚稳相YAP.凝固组织依次经历:非共晶Al2O3/ZrO2/YAG、不规则共晶Al2O3/ZrO2/YAG、纳米纤维状共晶Al2O3/ZrO2/YAG和复杂粗大的亚稳复合陶瓷Al2O3/ZrO2/YAP.分析表明,凝固组织的演变源于异质晶核点不断钝化导致形核过冷度和凝固路径改变,所以合理选择熔体温度和结晶种子是共晶组织调控的关键.
参考文献：
[1] Jun Zhang;Haijun Su;Kan Song.Microstructure, growth mechanism and mechanical property of Al_2O_3-based eutectic ceramic in situ composites[J].Journal of the European Ceramic Society,20117(7):1191-1198.
[2] Waku Y.;Sakata S.;Mitani A.;Shimizu K.;Hasebe M..Temperature dependence of flexural strength and microstructure of Al2O3/Y3Al5O12/ZrO2 ternary melt growth composites[J].Journal of Materials Science,200214(14):2975-2982.
[3] Maria Cristina Mesa;Patricia B. Oliete;Angel Larrea.Directionally Solidified Al_2O_3-Er_3Al_5O_(12)-ZrO_2 Eutectic Ceramics with Interpenetrating or Nanofibrillar Microstructure: Residual Stress Analysis[J].Journal of the American Ceramic Society,20123(3):1138-1146.
[4] S. Ochiai;S. Ikeda;S. Iwamoto.Residual stresses in YAG phase of melt growth Al_2O_3/YAG eutectic composite estimated by indentation fracture test and finite element analysis[J].Journal of the European Ceramic Society,200812(12):2309-2317.
[5] S. M. Lakiza.DIRECTIONALLY SOLIDIFIED EUTECTICS IN THE Al_2O_3-ZrO_2-Ln(Y)_2O_3 SYSTEMS (Review)[J].Powder Metallurgy and Metal Ceramics,20091/2(1/2):42-59.
[6] L.E. Matson;N. Hecht.Creep of directionally solidified alumina/YAG eutectic monofilaments[J].Journal of the European Ceramic Society,20058(8):1225-1239.
[7] 于建政;张军;苏海军;宋衎;刘林;傅恒志.激光双面区熔Al2O3/Y3Al5O12共晶自生复合陶瓷的制备与表征[J].无机材料学报,2012(8):843-848.
[8] 王进;刘俊成;曹献莹;任允鹏;白佳海.感应区熔法制备Al2O3/MgAl2O4/ZrO2共晶陶瓷[J].人工晶体学报,2013(9):1814-1818,1825.
[9] Zhao ZM;Zhang L;Song YG;Wang WG;Wu J.Microstructures and properties of rapidly solidified Y2O3 doped Al2O3/ZrO2 composites prepared by combustion synthesis[J].Scripta materialia,20069(9):819-822.
[10] Xuesong Fu;Guoqing Chen;Yufei Zu.Microstructure refinement of melt-grown Al_2O_3/YAG/ZrO_2 eutectic composite by a new method: Melt superheating treatment[J].Scripta materialia,20139(9):731-734.
[11] Guoqing Chen;Xuesong Fu;Junting Luo.Effect of cooling rate on the microstructure and mechanical properties of melt-grown Al_2O_3/YAG/ZrO_2 eutectic ceramic[J].Journal of the European Ceramic Society,201216(16):4195-4204.
[12] Sergij M.Lakiza;Lidia M.Lopato.Stable and metastable phas relations in the system alumina-zirconia-yttria[J].Journal of the American Ceramic Society,19974(4):893-902.
[13] Yoshiki Mizutani;Hideyuki Yasuda;Itsuo Ohnaka.Undercooled Melt Formation by Melting of Metastable Eutectic Structure in Al_2O_3-Y_2O_3-ZrO_2 System[J].Materials transactions,200211(11):2847-2854.
[14] Notthoff C.;Franz H.;Herlach DM.;Holland-Moritz D.;Feuerbacher B..Direct determination of metastable phase diagram by synchrotron radiation experiments on undercooled metallic melts[J].Physical review letters,20016(6):1038-1041.
材料期刊网