Molybdenum coatings due to their excellent wear resistant properties and sliding characteristics under dry friction conditions are often used in applications to resist friction and dry sliding. Since molybdenum metal is susceptible to oxidation, in this study, the molybdenum coating layers were successfully deposited at low pressure inert gas Ar using vacuum plasma spray technology (VPS). Characterization of the Mo coating was performed by measuring the microhardness of the coating layers using the Vickers HV0.3 method, the bond strength by tensile testing and the microstructure by optical microscopy (OM) and scanning electron microscopy (SEM). The microstructure of the coating layers was tested in deposited stateand after etching. The etching reagent used was NH3·H2O and H2O2 with a volume ratio of 1:2. The results showed that the coating has good mechanical properties, microhardness and high adhesion/cohesion strength. Layers of VPS - Mo coatings were composed of well-melted powder p...articles, partially unmelted particles with a good bond in the coating layers and micropores with a share below 0.5%. It was found that the microstructure of the coating consists mainly of lamellar structure and columnar crystal Mo grains. Tests have shown that the VPS - Mo coating layers have mechanical characteristics and a microstructure which fully enables the use of the coating on surfaces of parts which are required to have good sliding properties, resistance to wear and corrosion.
Prevlake molibdena se zbog svojih odličnih osobina na habanje i kliznih svojstva u uslovima suvog trenja često koriste u aplikacijama da se odupru trenju i suvom klizanju. Pošto je molibden metal osetljiv na oksidaciju, u ovoj studiji slojevi prevlake molibdena su uspešno deponovani na niskom pritisku inertnog gasa Ar vacuum plazma sprej tehnologijom (VPS). Karakterizacija prevlake Mo je izvršena merenjem mikrotvrdoće slojeva prevlake metodom Vickers HV0.3, čvrstoće spoja ispitivanjem na zatezanje i mikrostrukture metodom optičke mikroskopije (OM) i skening elektronske mikroskopije (SEM). Mikrostruktura slojeva prevlake je ispitana u deponovanom stanju i posle nagrizanja. Za nagrizanje se koristio reagens NH3·H2O i H2O2 sa zapreminskim odnosom 1:2. Dobijeni rezultati su pokazali da prevlaka ima dobre mehaničke karakteristike, mikrotvrdoću i visoku adheziono / kohezionu čvrstoću. Slojevi VPS - Mo prevlake su se sastojali od dobro istopljenih čestica praha, delimično neistopljenih čestic...a sa dobrom vezom u slojevima prevlake i mikro pora sa udelom ispod 0,5%. Utvrđeno je da se mikrostruktura prevlake uglavnom sastoji od lamelarne strukture i stubastih kristalnih zrna Mo. Ispitivanja su pokazala da VPS - Mo slojevi prevlake imaju mehaničke karakteristike i mikrostrukturu koje u potpunosti omogućavaju primenu prevlake na površinama delova od kojih se zahteva da imaju dobra klizna svojstva, otpornost na habanje i koroziju.
TY - JOUR
AU - Mrdak, Mihailo
AU - Lačnjevac, Časlav
AU - Rakin, Marko
AU - Veljić, Darko
AU - Bajić, Nikola
PY - 2019
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4277
AB - Molybdenum coatings due to their excellent wear resistant properties and sliding characteristics under dry friction conditions are often used in applications to resist friction and dry sliding. Since molybdenum metal is susceptible to oxidation, in this study, the molybdenum coating layers were successfully deposited at low pressure inert gas Ar using vacuum plasma spray technology (VPS). Characterization of the Mo coating was performed by measuring the microhardness of the coating layers using the Vickers HV0.3 method, the bond strength by tensile testing and the microstructure by optical microscopy (OM) and scanning electron microscopy (SEM). The microstructure of the coating layers was tested in deposited stateand after etching. The etching reagent used was NH3·H2O and H2O2 with a volume ratio of 1:2. The results showed that the coating has good mechanical properties, microhardness and high adhesion/cohesion strength. Layers of VPS - Mo coatings were composed of well-melted powder particles, partially unmelted particles with a good bond in the coating layers and micropores with a share below 0.5%. It was found that the microstructure of the coating consists mainly of lamellar structure and columnar crystal Mo grains. Tests have shown that the VPS - Mo coating layers have mechanical characteristics and a microstructure which fully enables the use of the coating on surfaces of parts which are required to have good sliding properties, resistance to wear and corrosion.
AB - Prevlake molibdena se zbog svojih odličnih osobina na habanje i kliznih svojstva u uslovima suvog trenja često koriste u aplikacijama da se odupru trenju i suvom klizanju. Pošto je molibden metal osetljiv na oksidaciju, u ovoj studiji slojevi prevlake molibdena su uspešno deponovani na niskom pritisku inertnog gasa Ar vacuum plazma sprej tehnologijom (VPS). Karakterizacija prevlake Mo je izvršena merenjem mikrotvrdoće slojeva prevlake metodom Vickers HV0.3, čvrstoće spoja ispitivanjem na zatezanje i mikrostrukture metodom optičke mikroskopije (OM) i skening elektronske mikroskopije (SEM). Mikrostruktura slojeva prevlake je ispitana u deponovanom stanju i posle nagrizanja. Za nagrizanje se koristio reagens NH3·H2O i H2O2 sa zapreminskim odnosom 1:2. Dobijeni rezultati su pokazali da prevlaka ima dobre mehaničke karakteristike, mikrotvrdoću i visoku adheziono / kohezionu čvrstoću. Slojevi VPS - Mo prevlake su se sastojali od dobro istopljenih čestica praha, delimično neistopljenih čestica sa dobrom vezom u slojevima prevlake i mikro pora sa udelom ispod 0,5%. Utvrđeno je da se mikrostruktura prevlake uglavnom sastoji od lamelarne strukture i stubastih kristalnih zrna Mo. Ispitivanja su pokazala da VPS - Mo slojevi prevlake imaju mehaničke karakteristike i mikrostrukturu koje u potpunosti omogućavaju primenu prevlake na površinama delova od kojih se zahteva da imaju dobra klizna svojstva, otpornost na habanje i koroziju.
PB - Engineering Society for Corrosion, Belgrade, Serbia
T2 - Zaštita materijala
T1 - Mechanical properties and microstructure of molybdenum coating layers deposited vacuum plasma spray process
T1 - Mehanička svojstva i mikrostruktura slojeva prevlake molibdena deponovane vakuum plazma sprej procesom
EP - 276
IS - 3
SP - 271
VL - 60
DO - 10.5937/zasmat1903271M
ER -
@article{
author = "Mrdak, Mihailo and Lačnjevac, Časlav and Rakin, Marko and Veljić, Darko and Bajić, Nikola",
year = "2019",
abstract = "Molybdenum coatings due to their excellent wear resistant properties and sliding characteristics under dry friction conditions are often used in applications to resist friction and dry sliding. Since molybdenum metal is susceptible to oxidation, in this study, the molybdenum coating layers were successfully deposited at low pressure inert gas Ar using vacuum plasma spray technology (VPS). Characterization of the Mo coating was performed by measuring the microhardness of the coating layers using the Vickers HV0.3 method, the bond strength by tensile testing and the microstructure by optical microscopy (OM) and scanning electron microscopy (SEM). The microstructure of the coating layers was tested in deposited stateand after etching. The etching reagent used was NH3·H2O and H2O2 with a volume ratio of 1:2. The results showed that the coating has good mechanical properties, microhardness and high adhesion/cohesion strength. Layers of VPS - Mo coatings were composed of well-melted powder particles, partially unmelted particles with a good bond in the coating layers and micropores with a share below 0.5%. It was found that the microstructure of the coating consists mainly of lamellar structure and columnar crystal Mo grains. Tests have shown that the VPS - Mo coating layers have mechanical characteristics and a microstructure which fully enables the use of the coating on surfaces of parts which are required to have good sliding properties, resistance to wear and corrosion., Prevlake molibdena se zbog svojih odličnih osobina na habanje i kliznih svojstva u uslovima suvog trenja često koriste u aplikacijama da se odupru trenju i suvom klizanju. Pošto je molibden metal osetljiv na oksidaciju, u ovoj studiji slojevi prevlake molibdena su uspešno deponovani na niskom pritisku inertnog gasa Ar vacuum plazma sprej tehnologijom (VPS). Karakterizacija prevlake Mo je izvršena merenjem mikrotvrdoće slojeva prevlake metodom Vickers HV0.3, čvrstoće spoja ispitivanjem na zatezanje i mikrostrukture metodom optičke mikroskopije (OM) i skening elektronske mikroskopije (SEM). Mikrostruktura slojeva prevlake je ispitana u deponovanom stanju i posle nagrizanja. Za nagrizanje se koristio reagens NH3·H2O i H2O2 sa zapreminskim odnosom 1:2. Dobijeni rezultati su pokazali da prevlaka ima dobre mehaničke karakteristike, mikrotvrdoću i visoku adheziono / kohezionu čvrstoću. Slojevi VPS - Mo prevlake su se sastojali od dobro istopljenih čestica praha, delimično neistopljenih čestica sa dobrom vezom u slojevima prevlake i mikro pora sa udelom ispod 0,5%. Utvrđeno je da se mikrostruktura prevlake uglavnom sastoji od lamelarne strukture i stubastih kristalnih zrna Mo. Ispitivanja su pokazala da VPS - Mo slojevi prevlake imaju mehaničke karakteristike i mikrostrukturu koje u potpunosti omogućavaju primenu prevlake na površinama delova od kojih se zahteva da imaju dobra klizna svojstva, otpornost na habanje i koroziju.",
publisher = "Engineering Society for Corrosion, Belgrade, Serbia",
journal = "Zaštita materijala",
title = "Mechanical properties and microstructure of molybdenum coating layers deposited vacuum plasma spray process, Mehanička svojstva i mikrostruktura slojeva prevlake molibdena deponovane vakuum plazma sprej procesom",
pages = "276-271",
number = "3",
volume = "60",
doi = "10.5937/zasmat1903271M"
}
Mrdak, M., Lačnjevac, Č., Rakin, M., Veljić, D.,& Bajić, N.. (2019). Mechanical properties and microstructure of molybdenum coating layers deposited vacuum plasma spray process. in Zaštita materijala
Engineering Society for Corrosion, Belgrade, Serbia., 60(3), 271-276.
https://doi.org/10.5937/zasmat1903271M
Mrdak M, Lačnjevac Č, Rakin M, Veljić D, Bajić N. Mechanical properties and microstructure of molybdenum coating layers deposited vacuum plasma spray process. in Zaštita materijala. 2019;60(3):271-276.
doi:10.5937/zasmat1903271M .
