The formation of Ti x N y and Ta x N y -based diffusion barriers

Nussupov, K. Kh.; Бейсенханов, Н. Б.; Beisembetov, I. K.; Kenzhaliev, B. K.; Seitov, Bekbolat; Dulatuly, E.; Bakranova, Dina

doi:10.1016/j.matpr.2017.04.026

Cited by 4 publications

(6 citation statements)

References 20 publications

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“…Judged by the phosphate ions contribute to an increase in electrochemical polarization, since form barrier films on the metal surface of the base the electrolytes were chosen. Having borates in a solution at micro plasma discharges, solid and heatresistant boroxide compounds are formed on the sample surface [12][13][14][15]. Fluoride compounds increase the hardness of the synthesized coating.…”

Section: Experimental Partmentioning

confidence: 99%

Physical and mechanical properties investigation of oxide coatings on titanium

Ramazanova¹,

Zamalitdinova²

2019

KIMS/CUMR/MShKP

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This paper studies the impact of rapidly flowing impulse effect of electrolytic plasma oxidation on physical and mechanical specifications of oxide coatings through the surface modification of VT1-0 titanium alloy. The present mode allows obtaining dense coatings with high mechanical properties. The electrolytic plasma oxidation process implementation leads to micro arc-discharge emergency in a short period through the small duration values of 250 µs anodic impulse. The achieved oxide coatings have high wearing features. Frictional testing resulted in wearing features increase in 4-15 times comparing to the sample off coating at to15 µm oxide layer thickness. Friction coefficient curves of oxide coating samples have shown no destruction of the coating to the bottom. A run-in area is recognized on the curves; sliding surfaces adapt to each other and pass to the stable friction regime. The later leads to the friction coefficient reduce and wear intensity reduction.

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Section: Experimental Partmentioning

confidence: 99%

Physical and mechanical properties investigation of oxide coatings on titanium

Ramazanova¹,

Zamalitdinova²

2019

KIMS/CUMR/MShKP

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“…% Co) there is the temperature shift about 165 °С [21], whereas for phase Со4Al13 (23.19 at.% Co) it is about 207 °С. The shifts in phase diagrams are not frequently reported, however, there are communications on temperature and concentration shifts compared to hand-book data for binary and intermetallic systems [22,23,24,25] Conclusions. To sum up, observations and identifications of structural peculiarities of DZ&RZs in Тi-Al, Co-Al, and Ni-Al systems obtained by means of the diffusion couple technique in a temperature range of 1,000-1,350 С using the SEM/EPMA methods resulted in the following conclusions:…”

Section: Experimental Dzandrzs Of Al-ti Al-ni Andmentioning

confidence: 99%

Microstructural peculiarities of aluminides of nickel, titanium, and cobalt

Ibraeva¹,

Sukurov²,

Aubakirova³

et al. 2019

KIMS/CUMR/MShKP

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Scanning electron microscopy, electron probe microanalysis, X-rays diffractometry, and microhardness measurements were used for studies of diffusion zones in systems Al-Тi, Al-Co, and Al-Ni formed by means of diffusion couples method in a temperature range of 1,300-1,350 С. It was shown that diffusion zones have the multilayer structure with numerous peculiarities. For a number of intermetallic compounds formed in all three systems there were revealed their temperature shifts using the electron probe microanalysis methods and confirmed with X-rays diffractometry. The correlation between the individual intermetallic layers and their microhardness numbers are not always evident. For some aluminides the microhardness can reach 7,060 ± 1,200 MPa (in globular area of Ti5Al11 and TiAl) and 4,938 MPa (in multilayer area of titanium aluminide TiAl2). For very thin (about 10 μm) layers in multilayer area the microhardness has been measured in the first time 4,000 MPa (TiAl) and 4,450 MPa (Ti3Al). The obtained microhardness numbers demonstrated reasonable coincidence with previous published results. Microhardness in Al-Ni system was measured as 5,200 ± 500 MPa (for β-NiAl) and 5,300 ± 860 MPa (for γ΄-Ni3Al). For cobalt aluminide СоАl from Аl-Со system the microhardness showed numbers 3,900 ± 200 MPa, whereas for СоАl3 it was higher up to 6,600 MPa. The intermetallic compound γ΄-Ni3Al considered as the most interesting from practical point of view had small (up to 10 μm) width whereas the next layer Ni3Al5 had the wider (100 μm) width. There were also revealed some globular Ti5Al11 having thin shells which consist of intermetallic Ti9Al2.

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“…Причина этому в том, что в отходах металлургии содержаться в большом количестве токсические химические вещества. Потому, тонны отходов металлургического производства, количество которых исчисляется миллиардами, являются немалой экологической проблемой для Казахстана [1,2,3].…”

Section: Introductionunclassified

“…Для процессов сгущения первостепенную роль играет способность глиносодержащих пульп при определенных условиях образовывать агрегативно и седиментационно устойчивые системы. Глинистые минералы при контакте с жидкой 3…”

Section: Introductionunclassified