热障涂层能提高工件的性能,延长其使用寿命,但目前对其厚度0.5 mm以上的研究报道不多.为此,以纳米ZrO2-8%(质量分数)Y2O3粉末(YSZ)为原料,用等离子体喷涂法制备了3种厚度(0.6,0.8,1.2 mm)的热障涂层,并对涂层的结构和性能进行了研究.结果表明:纳米涂层主要由未熔粉末及周围的柱状晶、等轴晶组成,可观察到大量纳米晶,喷涂电流对组织结构的影响远大于喷涂距离;热障涂层结合强度随涂层厚度的增加而降低;涂层隔热性能随涂层厚度的增加而提高,温度越高优势越明显.
参考文献
| [1] | Evans A G;He M Y;Hutchinson J W .Mechanic based scaling laws for the durability of TBCs[J].Progress in Materials Science,2001,46:249-271. |
| [2] | Walstonw S.Coating and surface technologies for turbine airfoils[A].,2004:579-588. |
| [3] | Matsumoto M;Yamaguchi N;Matsubara H .Low thermal conductivity and high temperature stability of ZrO2-Y2O3-LaO3 coatings by EB-PVD[J].Scripta Materialia,2004,50:867-871. |
| [4] | Nicholls JR.;Lawson KJ.;Johnstone A.;Rickerby DS. .Methods to reduce the thermal conductivity of EB-PVD TBCs[J].Surface & Coatings Technology,2002(0):383-391. |
| [5] | Kucuk A;Lima R S;Bemdt C C .Influence of plasma spray parameters on formation and morphology of ZrO2-8wt%Y2O3deposits[J].Journal of the American Ceramic Society,2000,84(04):693-700. |
| [6] | Taylor R;Brandon J R;Morrell P .Microstructure composition and property relationships of plasma-sprayed thermal barrier coatings[J].Surface and Coatings Technology,1992,50:141-149. |
| [7] | Harris KD.;Gonzalez EJ.;Smy T.;Robbie K.;Brett MJ.;Vick D. .Porous thin films for thermal barrier coatings[J].Surface & Coatings Technology,2001(2/3):185-191. |
| [8] | Lima RS.;Berndt CC.;Kucuk A. .Evaluation of microhardness and elastic modulus of thermally sprayed nanostructured zirconia coatings[J].Surface & Coatings Technology,2001(2/3):166-172. |
| [9] | Lima R S;Kucuk A;Berndt C C .Integrity of nanostructured partially stabilized zirconia after PS processing[J].Materials Science and Engineering,2001,A313:75-82. |
| [10] | Chen H;Zhou X;Ding C .Investigation of the thermal mechanical properties of a plasma-sprayed nanostructurod zirconia coating[J].Journal of the European Ceramic Society,2003,23:1 449-1 455. |
| [11] | Leon L. Shaw;Daniel Goberman;Ruiming Ren;Maurice Gell;Stephen Jiang;You Wang;T. Danny Xiao;Peter R. Strutt .The dependency of microstructure and properties of nanostructured coatings on plasma spray conditions[J].Surface & Coatings Technology,2000(1):1-8. |
| [12] | 翟长生,巫瑞智,王海军,周世魁,孙宝德.HEPJet等离子喷涂Al2O3性能试验研究[J].材料工程,2004(12):47-50,55. |
| [13] | 史国栋,陈贵清,梁军,杜善义.热障涂层热导率的研究进展[J].材料导报,2006(10):44-47. |
| [14] | 周洪,李飞,何博,陆燕玲,王俊,孙宝德.等离子喷涂热障涂层的隔热性分析[J].中国有色金属学报,2007(10):1609-1615. |
| [15] | 林锋,于月光,蒋显亮,曾克里,任先京,李振铎.等离子体喷涂纳米结构热障涂层微观组织及性能[J].中国有色金属学报,2006(03):482-487. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%