Formation of Superhard Coatings during Treatment of Titanium Films with Low-Temperature Nitrogen Plasma in Open Atmosphere

Author(s):  
M. Kh. Gadzhiev ◽  
R. M. Emirov ◽  
A. E. Muslimov ◽  
M. G. Ismailov ◽  
V. M. Kanevskii
Author(s):  
М.Х. Гаджиев ◽  
Р.М. Эмиров ◽  
А.Э. Муслимов ◽  
М.Г. Исмаилов ◽  
В.М. Каневский

Results of the formation of superhard coatings in the low-temperature nitrogen plasma treatment process in the open atmosphere of titanium films on sapphire substrates are given. It is shown that during plasma treatment a coating of nitrogen-containing TiO2 with rutile structure is formed with a double increase (in comparison with rutile TiO2) of microhardness (up to 27 GPa). The application of this coating leads to hardening of the surface of sapphire plates by 22-23%. High productivity and implementation of synthesis in an open atmosphere make it possible to consider the proposed procedure is promising for the production of superhard coatings with high resistance to oxygen.


1999 ◽  
Vol 85 (5) ◽  
pp. 2921-2928 ◽  
Author(s):  
Toshiko Mizokuro ◽  
Kenji Yoneda ◽  
Yoshihiro Todokoro ◽  
Hikaru Kobayashi

1996 ◽  
Vol 449 ◽  
Author(s):  
Min Hong Kim ◽  
Cheolsoo Sone ◽  
Jae Hyung Yi ◽  
Soun Ok Heur ◽  
Euijoon Yoon

ABSTRACTLow-temperature GaN buffer layers with smooth surfaces and high crystallinity could be prepared by a remote plasma enhanced metalorganic vapor deposition after the pretreatment of substrates with rf nitrogen plasma. Smooth AIN thin layer was formed on the (0001) sapphire substrate by the nitrogen plasma pretreatment for an hour. The AIN layer provided the nucleation sites for the subsequent buffer layer growth, thus highly preferred (0001) GaN buffer layers could be grown on the pretreated substrate. Formation of the AIN layer on sapphire and the surface smoothness were affected by pretreatment parameters such as exposure time, temperature, and rf power.


1998 ◽  
Vol 72 (11) ◽  
pp. 1308-1310 ◽  
Author(s):  
G. B. Alers ◽  
R. M. Fleming ◽  
Y. H. Wong ◽  
B. Dennis ◽  
A. Pinczuk ◽  
...  

2018 ◽  
Vol 85 ◽  
pp. 168-176 ◽  
Author(s):  
M.A. Badillo-Ávila ◽  
R. Castanedo-Pérez ◽  
M.A. Villarreal-Andrade ◽  
G. Torres-Delgado

2013 ◽  
Vol 49 (4) ◽  
pp. 1020-1026 ◽  
Author(s):  
Patrick W. Kuloba ◽  
Lawrence O. Gumbe ◽  
Michael W. Okoth ◽  
Martin Obanda ◽  
Fredrick M. Ng'ang'a

1996 ◽  
Vol 449 ◽  
Author(s):  
Cheolsoo Sone ◽  
Min Hong Kim ◽  
Jae Hyung Yi ◽  
Soun Ok Heur ◽  
Euijoon Yoon

ABSTRACTWe report the low-temperature growth of GaN layers on (0001) sapphire substrates by a remote plasma enhanced metal-organic chemical vapor deposition in the temperature range of 500 - 800 $C. Effects of process parameters on the growth of GaN were studied. The structural quality of GaN improved as the growth temperature increased and the rf power decreased. Highly oriented GaN layers could be deposited at fairly low temperatures such as 500 $C under low rf power with low growth rate conditions.


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