Influence of gas mixture during $N^{+}$ ion modification under plasma conditions on surface structure and mechanical properties of Al-Zn alloys
PBN-AR
Instytucja
Wydział Inżynierii Materiałowej i Ceramiki (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Surface & Coatings Technology
ISSN
0257-8972
EISSN
1879-3347
Wydawca
Elsevier Science SA
Rok publikacji
2015
Numer zeszytu
Strony od-do
30--37
Numer tomu
278
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
0.57
Autorzy
Pozostali autorzy
+ 2
Słowa kluczowe
EN
mechanical properties
microstructure
aluminum alloys
RF CVD
N+ ion modification
Streszczenia
Język
EN
Treść
Aluminum, and particularly its alloys, are the materials of an increasing significance in construction and automotive industry due to the combination of their strength properties. However, their functionality is limited mainly because of the susceptibility on tribological wear. This paper presents the results of the study aimed at determining the optimum conditions of the process of alloy surface modification with N+ ions in the atmosphere of N2-H2, using the method of chemical precipitation from gaseous phase, combined with a discharge of a frequency of 13.56MHz (radio frequency chemical vapor deposition). It was demonstrated that the process of Al-Zn alloy surface modification with nitrogen ions is a necessary prerequisite to obtain low-friction coatings (SiCNH in this case) characterized by a good and stable adhesion to the aluminum alloy substrate. The highest hardness is obtained in the case of SiCNH coating deposition process, preceded by the process of surface modification in plasma conditions, provided for N2 only (hardness 10.0GPa) of the N2/H2 mixture (flow ratio 3/1, hardness 10.5GPa). The surface of alloy combined with the obtained DLC (diamond-like carbon) layers, doped with N and Si atoms is characterized by ca. 30% decrease in the friction coefficient value (up to the 0.2 value) and ca. 25% decrease in the value of surface roughness (Ra, 6.5nm), compared to unmodified substrates. © 2015 Elsevier B.V.
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:091552
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