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Keysight Technologies Nanotribology of Hard Thin Film Coatings : A Case Study Using the G 200 Nanoindenter Application Note
| Content Provider | Semantic Scholar |
|---|---|
| Copyright Year | 2015 |
| Abstract | Thin ilm coatings are extensively used in various applications, such as microelectronics, data-storage media, surgical tools, biomedical prosthetic components, machining tools, turbine blades etc. Along with some functional improvements, these thin coatings also signiicantly enhance the mechanical reliability of the components. Hard thin ilms provide the resistance to mechanical deformation that the components need during their application. With the advancements in nanomaterials research, new thin ilm systems — often only a few 100’s of nm — are being developed to improve the performance of thin coatings in all of these technologically important areas. Hence, it is becoming more and more important to design new test methods that addresses the relevant deformation mechanisms in thin ilms, which are not suited to be characterized by the conventional test methods and standards. Nanoindentation has been a method of choice to characterize mechanical properties of small volumes of materials, such as thin ilms. This is especially true since an analytical method has been proposed to measure the properties of the ilms without the substrate effect. Besides measuring the elastic modulus and hardness of thin ilms, it is also important in many applications to understand the deformation behavior of the ilm due to lateral movement of sharp contacts, which is referred to as nanotribology. Most thin ilm hard coatings should possess two important characteristics, low coeficient of friction and a high strength adhesive bonding with the underlying substrate. In some applications a low wear rate under cyclic scratching may also be important, but it was not a critical concern for the thin ilm with extremely high hardness, discussed herein. Nanoindentation with lateral force measurement capability is an ideal tool to address the tribological characteristics of such thin ilm materials at nano length scales. Before we discuss the tribological properties of a thin hard coating, it is important to differentiate the measurements using a nanoindenter with those performed at micro/macro-scale. Tribology being a subject of interest for long time, there are quite a few international standards for tribological measurements, some of which also include measurement on thin coatings. However, according to all the standards, the measurements are performed with a probe of much larger length scale (usually 100’s of microns) compared to the coating material. Although the larger probes enable an optical investigation of the scratched region, the forces required for scratching a hard coating often surpasses any realistic values of forces these coatings encounter during their operation. The measurements with the larger probes are also affected by signiicant deformation of the substrate material. On the other hand, a sharper contact can damage the thin ilm coating at much smaller force and should be used to characterize Keysight Technologies Nanotribology of Hard Thin Film Coatings: A Case Study Using the G200 Nanoindenter |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://literature.cdn.keysight.com/litweb/pdf/5991-3319EN.pdf?id=2405197 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
