[1] Satpayev Univ, Alma Ata 050013, Kazakhstan
[2] Natl Acad Sci Ukraine, Bakul Inst Superhard Mat, UA-04074 Kyiv, Ukraine
[3] Ukrainian State Univ Railway Transport, UA-61050 Kharkiv, Ukraine
[4] Kharkov Natl Univ, UA-61022 Kharkiv, Ukraine
[5] YESSENOV Univ, Aktau 130000, Kazakhstan