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首页> 外文会议>STLE/ASME international joint tribology conference 2008 : Tribomaterials ; Nanotribology ; Biotribology ... >Non-Destructive High-Resolution Stiffness Mapping of Composite Engineered Surfaces
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Non-Destructive High-Resolution Stiffness Mapping of Composite Engineered Surfaces

机译：复合工程表面的无损高分辨率刚度映射

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Experimental evaluation of hardness, adhesion and Young's modulus has been performed on polyimide polymeric coatings used in LCD displays and on composite polymer-based materials used in automobiles and aircraft. A novel Universal Nano+Micro Tester UNMT-1 with a nano-analyzer module NA-2 has been utilized. It measures scratch-hardness of coatings and thin films, utilizing the same nano-tip for both scratching and nano-imaging under the constant load. It measures scratch-adhesion with the same diamond tip for both scratching and nano-imaging under the continuously-increasing load. It evaluates homogeneity of films and composite materials by simultaneous Young's modulus and topography nano-mapping, with a diamond nano-tip in a tapping mode, while frequency and phase of its vibrations are analyzed. The Young's modulus maps allowed us to evaluate the distribution of SiO/Si02 particles embedded in araldite, with varying SiO/Si02 concentration. While the topography images could not distinguish between the particles and polymeric matrix, the nano-mechanical maps revealed the effects of particle concentration and agglomeration on the local modulus of the material and thernrelationship between the SiO/Si02 uniformity and uniformity in modulus. The nano-scratches of 60-nm polyimide coatings at progressively increasing and constant loads generated adhesion and scratch-hardness data, respectively. Within the applied loads of 20 to 100 μN, we observed and determined both the critical load, at which the coating was delaminated from the glass substrate, and a corresponding lateral delamination force. The mutually complimentary nano-images and force graphs coincided nicely.
机译：已经对LCD显示器中使用的聚酰亚胺聚合物涂层以及汽车和飞机中使用的复合聚合物基材料进行了硬度，附着力和杨氏模量的实验评估。已利用具有纳米分析仪模块NA-2的新型Universal Nano + Micro Tester UNMT-1。它使用相同的纳米尖端在恒定负载下进行刮擦和纳米成像，从而测量涂层和薄膜的刮擦硬度。在负载不断增加的情况下，它使用相同的金刚石尖端测量刮擦粘附力，以进行刮擦和纳米成像。它通过同时使用杨氏模量和形貌纳米贴图，以及轻敲模式下的金刚石纳米尖端，来评估薄膜和复合材料的均质性，同时分析其振动的频率和相位。杨氏模量图使我们能够评估随SiO / SiO2浓度的变化而嵌入方钠石中的SiO / SiO2颗粒的分布。尽管形貌图像无法区分颗粒和聚合物基质，但纳米力学图揭示了颗粒浓度和团聚对材料局部模量以及SiO / SiO2均匀性和模量均匀性之间的关系的影响。 60 nm聚酰亚胺涂层的纳米划痕在逐渐增加和恒定的载荷下分别产生了附着力和划痕硬度数据。在施加的20到100μN的负载范围内，我们观察并确定了涂层从玻璃基板上分层时的临界载荷以及相应的横向分层力。相互互补的纳米图像和力图非常吻合。

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