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The tribological properties of zinc borate ultrafine powder as a lubricant additive in sunflower oil

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The tribological properties of zinc borate ultrafine powder as a lubricant additive in sunflower oil. / Zhao, Chuanli; Jiao, Yang; Chen, Yong; Ren, Guogang.

In: Tribology Transactions, Vol. 57, No. 3, 2014, p. 425-434.

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@article{4fa24f25043d4411becf98ddb03855bb,
title = "The tribological properties of zinc borate ultrafine powder as a lubricant additive in sunflower oil",
abstract = "This paper presents an investigation on the tribological properties of zinc borate ultrafine powder employed as a lubricant additive in sunflower oil. The stable dispersions of 0.5 wt%, 1 wt% and 2 wt% zinc borate ultrafine powder in sunflower oil were achieved by using an ultrasonic homogeniser. Both a 4-ball tester and a pin-on-disc tester were employed to evaluate the anti-wear and friction reduction capabilities of zinc borate ultrafine powder. Tribo-films with dark colour were generated on the worn surfaces and showed a good contrast with the substrate. The worn surface with different morphologies reflected as the colour alterations on the worn surface were observed when different lubricants were applied. The morphology and elemental analysis of the worn surfaces were studied using atomic force microscopy (AFM) and scanning electronic microscopy (SEM). Mechanical properties of the tribo-films and substrates were studied with a nano-indentation tester. Test results suggest that tribo-films generated on the worn surface have a relatively low hardness compared with the steel substrate. The substrates on the worn surfaces lubricated in sunflower oil with the powder demonstrated higher hardness than that of the substrate lubricated with pure sunflower oil due to the possible tribo-chemical reaction between the zinc borate additive and substrate. The combination of sunflower oil with 0.5% zinc borate ultrafine powder has delivered the most balanced performance in friction and wear reduction. This study has demonstrated the possibility of application of this industrially applicable solid lubricant additive (zinc borate) with a decomposable vegetable based lubricant oil. ",
keywords = "Nano-Indentation, Sunflower Oil Lubricant, Zinc Borate Ultrafine Powder, ANTIWEAR MECHANISM, SOLID DISPERSIONS, POINT CONTACTS, NANOPARTICLES, GRAPHITE, DYNAMICS, WEAR",
author = "Chuanli Zhao and Yang Jiao and Yong Chen and Guogang Ren",
year = "2014",
doi = "10.1080/10402004.2013.878776",
language = "English",
volume = "57",
pages = "425--434",
journal = "Tribology Transactions",
issn = "1040-2004",
publisher = "Taylor and Francis Ltd.",
number = "3",

}

RIS

TY - JOUR

T1 - The tribological properties of zinc borate ultrafine powder as a lubricant additive in sunflower oil

AU - Zhao, Chuanli

AU - Jiao, Yang

AU - Chen, Yong

AU - Ren, Guogang

PY - 2014

Y1 - 2014

N2 - This paper presents an investigation on the tribological properties of zinc borate ultrafine powder employed as a lubricant additive in sunflower oil. The stable dispersions of 0.5 wt%, 1 wt% and 2 wt% zinc borate ultrafine powder in sunflower oil were achieved by using an ultrasonic homogeniser. Both a 4-ball tester and a pin-on-disc tester were employed to evaluate the anti-wear and friction reduction capabilities of zinc borate ultrafine powder. Tribo-films with dark colour were generated on the worn surfaces and showed a good contrast with the substrate. The worn surface with different morphologies reflected as the colour alterations on the worn surface were observed when different lubricants were applied. The morphology and elemental analysis of the worn surfaces were studied using atomic force microscopy (AFM) and scanning electronic microscopy (SEM). Mechanical properties of the tribo-films and substrates were studied with a nano-indentation tester. Test results suggest that tribo-films generated on the worn surface have a relatively low hardness compared with the steel substrate. The substrates on the worn surfaces lubricated in sunflower oil with the powder demonstrated higher hardness than that of the substrate lubricated with pure sunflower oil due to the possible tribo-chemical reaction between the zinc borate additive and substrate. The combination of sunflower oil with 0.5% zinc borate ultrafine powder has delivered the most balanced performance in friction and wear reduction. This study has demonstrated the possibility of application of this industrially applicable solid lubricant additive (zinc borate) with a decomposable vegetable based lubricant oil.

AB - This paper presents an investigation on the tribological properties of zinc borate ultrafine powder employed as a lubricant additive in sunflower oil. The stable dispersions of 0.5 wt%, 1 wt% and 2 wt% zinc borate ultrafine powder in sunflower oil were achieved by using an ultrasonic homogeniser. Both a 4-ball tester and a pin-on-disc tester were employed to evaluate the anti-wear and friction reduction capabilities of zinc borate ultrafine powder. Tribo-films with dark colour were generated on the worn surfaces and showed a good contrast with the substrate. The worn surface with different morphologies reflected as the colour alterations on the worn surface were observed when different lubricants were applied. The morphology and elemental analysis of the worn surfaces were studied using atomic force microscopy (AFM) and scanning electronic microscopy (SEM). Mechanical properties of the tribo-films and substrates were studied with a nano-indentation tester. Test results suggest that tribo-films generated on the worn surface have a relatively low hardness compared with the steel substrate. The substrates on the worn surfaces lubricated in sunflower oil with the powder demonstrated higher hardness than that of the substrate lubricated with pure sunflower oil due to the possible tribo-chemical reaction between the zinc borate additive and substrate. The combination of sunflower oil with 0.5% zinc borate ultrafine powder has delivered the most balanced performance in friction and wear reduction. This study has demonstrated the possibility of application of this industrially applicable solid lubricant additive (zinc borate) with a decomposable vegetable based lubricant oil.

KW - Nano-Indentation

KW - Sunflower Oil Lubricant

KW - Zinc Borate Ultrafine Powder

KW - ANTIWEAR MECHANISM

KW - SOLID DISPERSIONS

KW - POINT CONTACTS

KW - NANOPARTICLES

KW - GRAPHITE

KW - DYNAMICS

KW - WEAR

U2 - 10.1080/10402004.2013.878776

DO - 10.1080/10402004.2013.878776

M3 - Article

VL - 57

SP - 425

EP - 434

JO - Tribology Transactions

JF - Tribology Transactions

SN - 1040-2004

IS - 3

ER -