采用等离子和电弧两种方法制备厚度不同的Ni-Cr-Al涂层,对比涂层在不同喷涂工艺下的组织结构、结合强度、涂层挠度和耐磨性能,并研究涂层结合强度和挠度随涂层厚度变化的规律.结果表明:涂层组织均呈现出典型的层状结构特征,界面结合良好.结合强度和挠度均随着厚度的增加而降低,当厚度＞0.5 mm时,等离子涂层的结合强度和挠度随厚度下降的幅度要大于电弧喷涂涂层,其中等离子涂层最大厚度为1.3 mm时结合强度为21.57 MPa,挠度为10.9×10-3in(l in=25.4 mm),而电弧喷涂涂层厚度为2.2 mm时的结合强度为22.79 MPa,挠度10.3×10-3in,涂层的绝对磨损量随着磨损时间的增加而升高,但相对磨损量则降低,涂层的磨损量随着磨损试验载荷的增大而增大.
参考文献
| [1] | Rowe R G .Ti2 AlNb based alloys outperform conventional titanium aluminides[J].Current Advancements in Molecular Medicines,1992,3:33-35. |
| [2] | Y. Wang;W. Tian;Y. Yang .Thermal shock behavior of nanostructured and conventional Al2O3/13 wt%TiO2 coatings fabricated by plasma spraying[J].Surface & Coatings Technology,2007(18):7746-7754. |
| [3] | R. S. Lima;B. R. Marple .Thermal Spray Coatings Engineered from Nanostructured Ceramic Agglomerated Powders for Structural, Thermal Barrier and Biomedical Applications: A Review[J].Journal of Thermal Spray Technology,2007(1):40-63. |
| [4] | Wang Zhi-ping;Dong Zu-jue;Wen Jin-lin .Development of single impact scratch test for evaluating of thermal sprayed coatings[J].China Welding,1998,7(01):15-22. |
| [5] | You Wang;Stephen Jiang;Meidong Wang;Shihe Wang;T. Danny Xiao;Peter R. Strutt .Abrasive wear characteristics of plasma sprayed nanostructured alumina/titania coatings[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2000(2):176-185. |
| [6] | G. Qian;T. Nakamura;C.C. Berndt .Effects of thermal gradient and residual stresses on thermal barrier coating fracture[J].Mechanics of materials,1998(2):91-110. |
| [7] | Rodriguez RMHP;Paredes RSC;Wido SH;Calixto A .Comparison of aluminum coatings deposited by flame spray and by electric arc spray[J].Surface & Coatings Technology,2007(1):172-179. |
| [8] | Hsueh C H;Jr Fuller E R .Analitical modeling of oxide thickness effects on residual stresses in thermal barrier coatings[J].Scripta Materialia,2000,42:781-787. |
| [9] | Takeuchi S;Takeda K .Modelling of residual stress in plasma-sprayed coating:Effect of substrate temperature[J].Surface and Coatings Technology,1990,43-44(1-3):426-435. |
| [10] | Yang Y;Liu Z;Luo C .Measurements of residual stress and bond strength of plasma sprayed laminated coatings[J].Surface and Coatings Technology,1997,89(1-2):97-100. |
| [11] | 邹慧,王志平.电弧喷涂Ni-Cr-Al涂层工艺优化与性能研究[J].热加工工艺,2009(16):82-85,81. |
| [12] | 纪岗昌,李长久,王豫跃,圆田启嗣.超音速火焰喷涂Cr3C2-NiCr涂层磨粒磨损行为[J].材料热处理学报,2002(04):34-38. |
| [13] | Knight R;Smith R W.HVOF sprayed 80/20NiCr coatings-process influence trends[A].Orlando(USA),1992:159-163. |
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%