Structural features and physico-mechanical properties of AlN-TiB2-TiSi2 amorphous-like coatings

The coating of the AlN–TiB2–TiSi2 system has been produced by the magnetron sputtering of a target. At the hightemperature (900 and 1300°C) actions the coating crystallization to form crystallites of sizes 11–25 nm has been observed. It has been defined that the amorphouslike structure is promising for the use of these coatings as diffusion barriers both as the independent elements and a contacting layer in multilayer wearresistant coatings. It has been shown that the use of the resultant composite as an effec tive protective coating for cutting tools will make it possible to increase the tools wear resistance by more than 30% at the temperature up to 1300°C in the cutting zone

Structural features and physico-mechanical properties of AlN-TiB2-TiSi2 amorphous-like coatings

The coating of the AlN–TiB2–TiSi2 system has been produced by the magnetron sputtering of a target. At the hightemperature (900 and 1300°C) actions the coating crystallization to form crystallites of sizes 11–25 nm has been observed. It has been defined that the amorphouslike structure is promising for the use of these coatings as diffusion barriers both as the independent elements and a contacting layer in multilayer wearresistant coatings. It has been shown that the use of the resultant composite as an effec tive protective coating for cutting tools will make it possible to increase the tools wear resistance by more than 30% at the temperature up to 1300°C in the cutting zone

Clinical and X-ray diagnostic criteria for maxillofacial damage in children with juvenile limited scleroderma

The objective of our study was to improve the diagnosis of maxillofacial lesions in children with juvenile scleroderma. We performed a dental examination of 41 children from 4 to 17 years old with juvenile scleroderma. Based on the clinical X-ray examination we identified the main diagnostic signs of the maxillofacial damage in children with juvenile scleroderma, including partial hemiatrophy, plaque or linear facial lesions, reduced salivation, atrophic glossitis, plaque spots of mucous tongue atrophy, ischemia or shortening of the sublingual bridle, local recession of the gums of the lower jaw, dystopia and tooth supraposition, disocclusion, delay teething, spontaneous resorption of the permanent teeth roots, one-sided delay in the development of jaw bones. Using this complex of symptoms a dentist at the first visit can pre-diagnose scleroderma, which is especially important for the selection of adequate methods of treatment and prevention