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Uporaba kvarčne mikrotehtnice za merjenje adsorpcije aditivov iz olja na prevleke iz DLC [Elektronski vir]Rapuc, Aleš ; Simič, Rok ; Kalin, MitjanRazlične trde prevleke se v sodobnih mehanskih sistemih vedno pogosteje uporabljajo na visokoobremenjenih kontaktih. Izredno zanimive so prevleke iz diamantu podobnega ogljika (DLC), saj omogočajo ... zelo nizek koeficient trenja in nizko obrabo. Obstoječe kombinacije olj in aditivov, ki so učinkovite v primerih kovinskih kontaktov, so postale zaradi drugačne reaktivnosti novih površin, neoptimalne, kar kliče po ustrezni prilagoditvi maziv. Za razumevanje interakcij aditivov s površino je ključnega pomena tudi razumevanje procesa adsorpcije. Trenutno uporabljene metode za analizo obsegajo različne vrste spektroskopije (masna, infrardeča, rentgenska itd.) in so zelo primerne v primeru kovinskih površin. V primeru DLC prevlek pa velika količina ogljika v strukturi v primerjavi z ostalimi materiali otežuje analizo interakcij z aditivi in mazivi, saj so le%ti prav tako večinoma sestavljeni iz ogljikovodikov. Poleg tega omenjene metode ne omogočajo določanja količine adsorbiranih molekul, hitrosti adsorpcije in fizikalnih lastnosti adsorbiranega filma. Alternativo tem metodam predstavlja kvarčna mikrotehtnica, ki temelji na principu spremembe resonančne frekvence kvarčnega kristala zaradi spremembe mase ob adsorpciji molekul. Metoda omogoča hitro in enostavno zaznavanje poteka adsorpcije, količine adsorbiranih molekul in celo določitev viskoznosti adsorbiranega filma, a je merjenje lastne frekvence kvarčnega kristala v viskozni tekočini izredno težavno zaradi disipacije energije. Izbira ustreznega vzbujevalnega sistema je tako ključnega pomena. V tem delu smo tako poleg osnov mazanja DLC prevlek preučili različne vrste vzbujevalnih sistemov kvarčnih kristalov, ki bi lahko omogočale zaznavanje adsorpcije iz viskoznih tekočin.Source: Zbornik del [Elektronski vir] (F. 180-188)Type of material - conference contributionPublish date - 2015Language - slovenianCOBISS.SI-ID - 14153243
Author
Rapuc, Aleš |
Simič, Rok |
Kalin, Mitjan
Topics
diamantu podoben ogljik |
prevleke |
mazanje |
olja
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Rapuc, Aleš | |
Simič, Rok | 33370 |
Kalin, Mitjan | 14556 |
Source: Personal bibliographies
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