以γ-AlOOH 和 TiO2为原料,添加不同质量分数 SiC 晶须(SiCw ),采用无压反应烧结法制备多孔(Al6 Si2 O13+TiC)/Al2 TiO5复合材料,分析了 SiCw 质量分数对(Al6 Si2 O13+TiC)/Al2 TiO5复合材料孔隙率和抗压强度的影响,讨论了 SiCw 的强化机制。结果表明：不添加 SiCw 时,产物主要为 Al2 TiO5和少量 Al2 O3,还有少量未反应的TiO2；加入 SiCw 之后,还形成了 Al6 Si2 O13和TiC相,TiC和 Al6 Si2 O13分别以规则颗粒状和晶须形态存在于 Al2 TiO5基体中。TiC颗粒与 Al6 Si2 O13晶须通过细化显微组织、裂纹偏转和晶须桥连机制,起到协同强化作用。SiCw 的添加使孔隙率和抗压强度同时大幅度提高,随着 SiCw 质量分数的增加,(Al6 Si2 O13+TiC)/Al2 TiO5复合材料孔隙率降低,抗压强度提高的速率减小,当 SiCw 的质量分数为7.2%时,抗压强度最高,达到301.81 MPa。
Porous (Al6 Si2 O13+TiC)/Al2 TiO5 composites were fabricated by pressless reaction sintering method withγ-AlOOH,TiO2 as raw materials and adding different mass fractions of SiC whiskers (SiCw ).The effect of SiCw mass fraction on the porosity and compressive strength of (Al6 Si2 O13+TiC)/Al2 TiO5 composites was ana-lyzed,and the strengthening mechanism of SiCw was discussed.The results show that,the product without SiCw is composed of Al2 TiO5 ,a small amount of Al2 O3 ,and a few of unreacted TiO2 .After adding SiCw ,Al6 Si2 O13 and TiC phases are formed.Moreover,TiC and Al6 Si2 O13 exist in Al2 TiO5 matrix mainly with regularly particles and whiskers morphology respectively.TiC particles and Al6 Si2 O13 whiskers synergeticly reinforce composites by refi-ning the microstructure,crack deflecting and whiskers bridging effects.Both porosity and compressive strength im-prove with the addition of SiCw .With the increasing of SiCw mass fraction,the porosity of (Al6 Si2 O13 +TiC)/Al2 TiO5 composites decreases,but the increasing rate of compressive strength slows down gradually.When SiCw mass fraction is 7.2%,the compressive strength is highest,which can reach 301.81 MPa.
参考文献
| [1] | SHEN Yang;RUAN Yu-Zhong;YU Yan.Study on the In-situ Synthesis of Aluminum Titanate Sintered by Waste Aluminum Slag[J].结构化学,2009(1):61-66. |
| [2] | Guogang Xu;Yinghua Ma;Guozhi Ruan;Hongzhi Cui;Zhihui Zhang;Bin Bai.Preparation of porous Al_2TiO_5 ceramics reinforced by in situ formation of mullite whiskers[J].Materials & design,2013May(May):57-60. |
| [3] | Sa Li;Chang-An Wang;Jun Zhou.Effect of starch addition on microstracture and properties of highly porous alumina ceramics[J].CERAMICS INTERNATIONAL,20138(8):8833-8839. |
| [4] | R. Naghizadeh;H.R. Rezaie;F. Golestani-fard.The influence of composition, cooling rate and atmosphere on the synthesis and thermal stability of aluminum titanate[J].Materials Science & Engineering, B. Solid-State Materials for Advanced Technology,20091/3(1/3):20-25. |
| [5] | I. M. Low;D. Lawrence;R. I. Smith.Factors Controlling the Thermal Stability of Aluminum Titanate Ceramics in Vacuum[J].Journal of the American Ceramic Society,200510(10):2957-2961. |
| [6] | Jayasankar, M;Ananthakumar, S;Mukundan, R;Wunderlich, W;Warrier, KGK.Al2O3 @ TiO2-A simple sol-gel strategy to the synthesis of low temperature sintered alumina-aluminium titanate composites through a core-shell approach[J].Journal of Solid State Chemistry,200810(10):2748-2754. |
| [7] | Bin Meng;Jinhui Peng.Effects of in situ synthesized mullite whiskers on flexural strength and fracture toughness of corundum-mullite refractory materials[J].CERAMICS INTERNATIONAL,20132(2):1525-1531. |
| [8] | Suminar Pratapa;Khusnul Umaroh;Eva Weddakarti.Microstructural and decomposition rate studies of periclase-added aluminum titanate-corundum functionally-graded materials[J].Materials Letters,20115(5):854-856. |
| [9] | Fidel H. Perera;Antonia Pajares;Juan J. Melendez.Strength of aluminium titanate/mullite composites containing thermal stabilizers[J].Journal of the European Ceramic Society,20119(9):1695-1701. |
| [10] | H.R. Rezaie;R. Naghizadeh;N. Farrokhnia.The effect of Fe_2O_3 addition on tialite formation[J].CERAMICS INTERNATIONAL,20092(2):679-684. |
| [11] | 姜澜;陈晓燕;韩国明;孟宇.添加剂对钛酸铝陶瓷性能的影响[J].中国有色金属学报（英文版）,2011(7):1574-1579. |
| [12] | Zan Qingfeng;Dong Limin;Wang Chen.Improvement of mechanical properties of Al_2O_3/Ti_3SiC_2 multilayer ceramics by adding SiC whiskers into A1_2O_3 layers[J].CERAMICS INTERNATIONAL,20073(3):385-388. |
| [13] | Peng Wu;Yong Zheng;Yongle Zhao;Haizhou Yu.Effect of SiC whisker addition on the microstructures and mechanical properties of Ti(C, N)-based cermets[J].Materials & design,20112(2):951-956. |
| [14] | 刘顾;汪刘应;陈桂明;魏皖宁;华绍春;朱二雷.CNTs-SiC/Al2O3-TiO2复合涂层的制备及其性能[J].无机材料学报,2011(11):1187-1192. |
| [15] | 何平伟;李晓云;陆鑫翔;丘泰;杨建.低温常压烧结制备碳化硅-莫来石复相材料[J].硅酸盐学报,2013(5):696-700. |
| [16] | 田贵山;李双;谢志鹏.碳化硅晶须改性反应烧结碳化硅陶瓷的显微结构及性能[J].硅酸盐学报,2014(12):1520-1527. |
| [17] | Yin, Z.;Huang, C.;Zou, B.;Liu, H.;Zhu, H.;Wang, J..Study of the mechanical properties, strengthening and toughening mechanisms of Al_2O_3/TiC micro-nano-composite ceramic tool material[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2013:9-15. |
| [18] | Samer, Nassim;Andrieux, Jerome;Gardiola, Bruno;Karnatak, Nikhil;Martin, Olivier;Kurita, Hiroki;Chaffron, Laurent;Gourdet, Sophie;Lay, Sabine;Dezellus, Olivier.Microstructure and mechanical properties of an Al-TiC metal matrix composite obtained by reactive synthesis[J].Composites, Part A. Applied science and manufacturing,2015:50-57. |
| [19] | 王海龙;汪长安;张锐;黄勇;许红亮;卢红霞.纳米SiC晶须和SiC颗粒混合增韧ZrB2陶瓷性能[J].复合材料学报,2009(4):95-101. |
| [20] | 李书海;崔洪芝;郑文龙;崔德运.SiCw对反应烧结多孔Al2TiO5-SiCw复合材料的影响[J].复合材料学报,2014(5):1270-1276. |
| [21] | 崔洪芝;李书海;崔德运.SiC对反应烧结多孔Al2TiO5的物相及组织性能影响[J].无机材料学报,2014(5):509-514. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%