石墨
材料科学
各向同性
各向异性
紧迫的
复合材料
极点图
结晶度
面积密度
表征(材料科学)
微观结构
纳米技术
光学
物理
作者
Tanzeela Anis,Hassan Waqas,Z. Asghar,Syed Zahid Hussain,Sumaira Naz,Muhammad bin Ahmed,Tayyab Khan,Fiaz Khan
出处
期刊:Defect and Diffusion Forum
日期:2022-08-19
卷期号:418: 131-136
摘要
Graphite is a versatile material which is also used in various load bearing applications such as thrust bearings and dies for mechanical pressing such as hot pressing. Natural graphite has anisotropic layered structure which reduces its (compressive) strength in axes which are not parallel to c-axis. To increase strength, isotropy is introduced in graphite structure by breaking down its layers and minimizing grain size. We performed an in-depth characterization of relative aniostropy in graphite using pole figure density mapping. Locally available graphite samples were characterized by XRD and pole figures/3-D orientation distribution function (ODF). SEM and hardness testing were also performed to substantiate the pole density method. Results show that it is possible to characterize (qualitative/quantitative) isotropy or lack thereof in graphite by correlating it with the distribution of crystallinity/pole density mapping of (002) poles and 3D ODF figures.
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