采用大气等离子喷涂技术在321不锈钥表面制备了Fe70Ni27B3屏蔽涂层和Fe64Ni20B16/Ni-al梯度涂层.对两种涂层进行分层研磨后,分别采用机械抛光和电抛光处理,测试了涂层表面及内部不同厚度处的相组成和宏观残余应力.结果表明:涂层中具有中子屏蔽功能的含硼相在Fe70Ni27B3涂层中主要为Fe2B相,含有少量的Fe7B相;在Fe64Ni20816/Ni-Al梯度涂层中主要为FeB相,有少量的Fe2B相和Fe7B相.两种涂层表面的残余应力均为拉应力,沿涂层向内部的拉应力逐渐减小,至涂层/基体界面附近时转化为压应力.两种残余应力大小均不超过50 MPa,而梯度涂层由于减小了界面热失配程度以及降低了硬质铁硼相浓度,其残余应力大小在涂层厚度方向上均小于Fe70Ni27B3涂层.
参考文献
| [1] | 杨文锋,刘颖,杨林,李德安,李军.核辐射屏蔽材料的研究进展[J].材料导报,2007(05):82-85. |
| [2] | Greuner H;Balden M;Boeswirth B;Bolt H;Gadow R;Grigull P;Hofmann H;Huber T;Kasparek W;Kumric H;Lindig S;Matern G;Mayer M;Neu R;Renner H;Roth J;Riegert-Escribano M;Simon-Weidner J;Wacker R .Evaluation of vacuum plasma-sprayed boron carbide protection for the stainless steel first wall of WENDELSTEIN 7-X[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2004(0):849-854. |
| [3] | 张联盟.材料学[M].北京:高等教育出版社,2005:263. |
| [4] | 梁志德;王福.现代物理测试技术[M].北京:冶金工业出版社,2003 |
| [5] | You JH;Hoschen T;Lindig S .Determination of elastic modulus and residual stress of plasma-sprayed tungsten coating on steel substrate[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2006(1/2):94-101. |
| [6] | Pina J.;Dias A.;Lebrun JL. .Study by X-ray diffraction and mechanical analysis of the residual stress generation during thermal spraying[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):21-31. |
| [7] | Niederhofer et al.[J].Surface and Coatings Technology,1999,120-121:173. |
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%