A Study on Erosion Wear Behavior of Alkaline and Silane Modified Coconut Sheath and Red Mud Reinforced Hybrid Composites

ABSTRACT

In the present work, the effect of erosion variable on the erosion rate of the novel coconut sheath fiber and red mud reinforced polyester composites is evaluated. The composites are fabricated with three forms of fiber reinforcement. Erosion experiment is conducted as per the ASTM G76 by varying impact angle, erodent velocity, and erodent discharge rate. The experiment design is modeled using the central composite design and analyzed using the response surface methodology and analysis of variance technique. The impact angle is found to be the most significant factor affecting the composite erosion rate. From erosion wear analysis, it is found that the interfacial adhesion between the fiber matrix is critical in the reduction of erosion rate. The composite with silane treated fiber showed reduced erosion rate when compared to the untreated and alkaline treated fiber composites. Further, the wear mechanism was analyzed on the eroded specimen using SEM analysis. Finally, the multiple response optimization was carried out using the desirability function method and found that erosion rate can be minimized at impact angle of 90°, erodent discharge rate of 4.45 g/m, and erodent velocity of 70 m/s.

摘要

在本研究中, 评估了侵蚀变量对新型椰鞘纤维和赤泥增强聚酯复合材料侵蚀速率的影响. 该复合材料由三种形式的纤维增强材料制成. 根据ASTM G76标准, 通过改变冲击角、侵蚀速度和侵蚀剂排放率进行侵蚀试验. 实验设计采用中心组合设计进行建模, 并采用响应面法和方差分析技术进行分析. 冲击角是影响复合材料冲蚀率的最重要因素. 通过冲蚀磨损分析, 发现纤维基体之间的界面粘附对降低冲蚀速率至关重要. 与未经处理和碱处理的纤维复合材料相比, 经硅烷处理的纤维复合材料的侵蚀率降低. 此外, 利用SEM分析了腐蚀试样的磨损机理. 最后, 利用期望函数法进行了多响应优化, 发现在90°冲击角下, 冲蚀率可以最小化, 侵蚀流量4.45g/m, 侵蚀速度70m/s.

KEYWORDS:

• Natural fiber
• surface treatment
• red mud
• polymer composite
• erosion
• regression modeling

关键词:

• 天然纤维
• 表面处理
• 赤泥
• 聚合物复合材料
• 腐蚀
• 回归建模

Acknowledgments

The authors would like to express their sincere thanks to the Ministry of environment forest and climatic change (MOEF & CC), Government of India, for the financial support to carry out this work (Project No 168/2016/RE (F No 19-20/2012-RE)).

Declaration of Competing Interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.