Surface modifying complexes with nanolayer architecture are widely used in various fields of activity (optical systems, tribological pairs, cutting tools, etc.). In many cases, brittle fracture as a result of active cracking is the key or even the dominant mechanism for the destruction of such complexes. The report discusses the factors that can slow down the development of cracks in nanolayer systems and, thus, increase their resistance to brittle fracture. Both theoretical substantiation and practical examples of crack propagation inhibition are presented. The influence of the crystalline structure of the coating on the cracking pattern has been studied. The investigation has found the significant effect of the crystalline structure of the coating layers on the cracking pattern. It can be noticed that in addition to the nanolayer structure, the pattern of crack propagation can also be affected by the crystalline structure of the coating. With a decrease in the deformation energy, the intercrystalline interfaces have a greater influence on the crack growth direction, and the crack can stop, resting against a crystal boundary. Thus, during the further modeling, it is also important to take into account the influence of the crystalline structure of the nanolayers.
During operation, nanostructured materials can be exposed to high temperatures, which have a significant effect on their properties. Studying the effect of temperature on various properties of nanomaterials, in particular, tribological properties, is an important task, the solution of which will make it possible to select the optimal architecture for specific operating conditions. In this work, we studied the effect of nanostructure parameters on the tribological properties of materials in the temperature range from room temperature to 1000 ° C. The regularities of changes in the tribological properties of nanolayer structures were revealed, which made it possible to determine the dependence of the adhesive (molecular) component of the friction coefficient fM on temperature. The effect of the fM value at elevated temperatures and thermal stability of this parameter on the functional properties of products with a modified surface layer has been established.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.