• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Surface & Coatings Technology >Microstructural and mechanical properties of advanced HVOF-sprayed WC-based cermet coatings
【24h】

Microstructural and mechanical properties of advanced HVOF-sprayed WC-based cermet coatings

机译：先进的HVOF喷涂WC基金属陶瓷涂层的微观结构和力学性能

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The aim of this research was to investigate the microstructural and mechanical properties of WC-FeCrAl and WC-NiMoCrFeCo coatings deposited by high velocity oxygen fuel (HVOF) spraying. Microstructural characterizations of feedstock powders and coatings were carried out using X-ray diffractometry (XRD) and scanning electron microscopy (SEM) equipped with energy dispersive X-ray (EDX) analysis. Image analysis techniques were utilized to measure the porosity level of the coatings, the volume fraction of different phases and the carbide grain size in the powders and coatings. Microhardness and indentation fracture toughness measurements were executed to evaluate the mechanical properties of the coatings. For comparison, the same experiments were performed on conventional WC-Co coating deposited by similar HVOF spraying parameters. WC-NiMoCrFeCo coating showed the maximum W2C/WC peak ratio of 40.42% in comparison to WC-FeCrAl (12.48%) and WC-Co (9.14%) coatings indicating a larger extent of W2C phase precipitated during solidification of WC-NiMoCrFeCo coating. The highest porosity level of 5.1 vol% was observed in the case of WC-FeCrAl coating due to the lower temperature of the powder particles causing the FeCrAl matrix not to be fully melted. The microhardness of WC-FeCrAl coating was found to be 1498 HV0.3 indicating higher value as compared to WC-Co and WC-NiMoCrFeCo coatings with 1305 and 1254 HV0.3, respectively. Moreover, a mean fracture toughness of 5.9 MPam(1/2) was obtained for WC-Co, which was substantially greater than that for both WC-FeCrAl and WC-NiMoCrFeCo coatings with 3.1 and 2.8 MPam(1/2), respectively. (C) 2015 Elsevier B.V. All rights reserved.
机译：这项研究的目的是研究通过高速氧气燃料（HVOF）喷涂沉积的WC-FeCrAl和WC-NiMoCrFeCo涂层的显微组织和力学性能。使用X射线衍射（XRD）和配有能量色散X射线（EDX）分析的扫描电子显微镜（SEM）对原料粉末和涂料的微观结构进行了表征。利用图像分析技术来测量涂层的孔隙率水平，不同相的体积分数以及粉末和涂层中的碳化物晶粒尺寸。进行显微硬度和压痕断裂韧性测量以评估涂层的机械性能。为了进行比较，对通过类似的HVOF喷涂参数沉积的常规WC-Co涂层进行了相同的实验。与WC-FeCrAl（12.48％）和WC-Co（9.14％）涂层相比，WC-NiMoCrFeCo涂层的最大W2C / WC峰值比率为40.42％，表明在WC-NiMoCrFeCoCo涂层固化过程中有较大程度的W2C相沉淀。在WC-FeCrAl涂层的情况下，观察到的最高孔隙度为5.1％（体积），这是因为粉末颗粒的温度较低，导致FeCrAl基体无法完全熔化。发现WC-FeCrAl涂层的显微硬度为1498 HV0.3，表明其值分别高于具有1305和1254 HV0.3的WC-Co和WC-NiMoCrFeCo涂层。此外，WC-Co的平均断裂韧性为5.9 MPam（1/2），大大高于分别具有3.1和2.8 MPam（1/2）的WC-FeCrAl和WC-NiMoCrFeCo涂层的平均断裂韧性。 （C）2015 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号