National Repository of Grey Literature 4 records found  Search took 0.01 seconds. 
Testing of sliding coatings for space applications
Velička, Jan ; Pouzar, Josef (referee) ; Košťál, David (advisor)
This bachelor thesis deals with sliding coatings for use in space applications. In the experimental part, the number of cycles to wear for a molybdenum disulfide based coating was investigated. This coating was deposited on a beryllium copper CuBe substrate. The coating was tested for its possible application to bolt threads. The coefficient of friction of all samples was measured on a tribometer in an atmospheric environment. The specimens were loaded with a normal force of 35 N during the measurement. The number of cycles to wear was compared for specimens differing in coating time. The number of cycles was found to be similar for lower coating times. Then the number of cycles to wear started to increase with the coating time. From the findings, it can be said that increasing the coating time increases the coating life. Such a coating is suitable for the protection of bolts against galling.

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