Study on tribology of oil-soluble lanthanum (neodymium) dialkyldithiophosphates

Yu Jie Feng; Li Xin Sun; Xiao Jun Sun; Yan Hu; Wei Min Cai

Study on tribology of oil-soluble lanthanum (neodymium) dialkyldithiophosphates

Yu Jie Feng^*
, Li Xin Sun
, Xiao Jun Sun
, Yan Hu
, Wei Min Cai

^*Corresponding author for this work

School of Environment

Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Four kinds of oil-soluble Lanthanum (Neodymium) Dialkyldithiophosphate, LaDDP-3, LaDDP-8, NdDDP-3, NdDDP-8, were synthesized from P₂S₅, isopropanol or isooctyl alcohol and lanthanum chloride or neodymium chloride. The structure and element composition of these compounds were determined by Infrared Spectrography, EDTA titration and chemical analysis. Tribological behavior was evaluated and compared with that of commercialz inc dialkyldithiophosphate. The value of P_B and the wear spot diameter at different loading for the four kinds of compounds were evaluated and the results indicate that ReDDP in this study shows more excellent tribological characteristics than ZnDDP. Results of energy dispersion analysis of X-ray (EDXA) show that La and Nd can diffuse into the wear spot surface under the tribological condition and then a rich La or Nd layer is found. This might be the main reason for the better extreme-pressure and antiwear properties of ReDDP.

Original language	English
Pages (from-to)	324-328+332
Journal	Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology
Volume	34
Issue number	3
State	Published - Jun 2002

Keywords

Boundary lubricating film
Extreme-pressure and antiwear additive
Lanthanum neodymium dialkyldithio-phosphate
Tribology of rare earth

Cite this

@article{57e110c3019a4f3ba390c9969bd15823,

title = "Study on tribology of oil-soluble lanthanum (neodymium) dialkyldithiophosphates",

abstract = "Four kinds of oil-soluble Lanthanum (Neodymium) Dialkyldithiophosphate, LaDDP-3, LaDDP-8, NdDDP-3, NdDDP-8, were synthesized from P2S5, isopropanol or isooctyl alcohol and lanthanum chloride or neodymium chloride. The structure and element composition of these compounds were determined by Infrared Spectrography, EDTA titration and chemical analysis. Tribological behavior was evaluated and compared with that of commercialz inc dialkyldithiophosphate. The value of PB and the wear spot diameter at different loading for the four kinds of compounds were evaluated and the results indicate that ReDDP in this study shows more excellent tribological characteristics than ZnDDP. Results of energy dispersion analysis of X-ray (EDXA) show that La and Nd can diffuse into the wear spot surface under the tribological condition and then a rich La or Nd layer is found. This might be the main reason for the better extreme-pressure and antiwear properties of ReDDP.",

keywords = "Boundary lubricating film, Extreme-pressure and antiwear additive, Lanthanum neodymium dialkyldithio-phosphate, Tribology of rare earth",

author = "Feng, \{Yu Jie\} and Sun, \{Li Xin\} and Sun, \{Xiao Jun\} and Yan Hu and Cai, \{Wei Min\}",

year = "2002",

month = jun,

language = "英语",

volume = "34",

pages = "324--328+332",

journal = "Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology",

issn = "0367-6234",

publisher = "Harbin Institute of Technology",

number = "3",

}

TY - JOUR

T1 - Study on tribology of oil-soluble lanthanum (neodymium) dialkyldithiophosphates

AU - Feng, Yu Jie

AU - Sun, Li Xin

AU - Sun, Xiao Jun

AU - Hu, Yan

AU - Cai, Wei Min

PY - 2002/6

Y1 - 2002/6

N2 - Four kinds of oil-soluble Lanthanum (Neodymium) Dialkyldithiophosphate, LaDDP-3, LaDDP-8, NdDDP-3, NdDDP-8, were synthesized from P2S5, isopropanol or isooctyl alcohol and lanthanum chloride or neodymium chloride. The structure and element composition of these compounds were determined by Infrared Spectrography, EDTA titration and chemical analysis. Tribological behavior was evaluated and compared with that of commercialz inc dialkyldithiophosphate. The value of PB and the wear spot diameter at different loading for the four kinds of compounds were evaluated and the results indicate that ReDDP in this study shows more excellent tribological characteristics than ZnDDP. Results of energy dispersion analysis of X-ray (EDXA) show that La and Nd can diffuse into the wear spot surface under the tribological condition and then a rich La or Nd layer is found. This might be the main reason for the better extreme-pressure and antiwear properties of ReDDP.

AB - Four kinds of oil-soluble Lanthanum (Neodymium) Dialkyldithiophosphate, LaDDP-3, LaDDP-8, NdDDP-3, NdDDP-8, were synthesized from P2S5, isopropanol or isooctyl alcohol and lanthanum chloride or neodymium chloride. The structure and element composition of these compounds were determined by Infrared Spectrography, EDTA titration and chemical analysis. Tribological behavior was evaluated and compared with that of commercialz inc dialkyldithiophosphate. The value of PB and the wear spot diameter at different loading for the four kinds of compounds were evaluated and the results indicate that ReDDP in this study shows more excellent tribological characteristics than ZnDDP. Results of energy dispersion analysis of X-ray (EDXA) show that La and Nd can diffuse into the wear spot surface under the tribological condition and then a rich La or Nd layer is found. This might be the main reason for the better extreme-pressure and antiwear properties of ReDDP.

KW - Boundary lubricating film

KW - Extreme-pressure and antiwear additive

KW - Lanthanum neodymium dialkyldithio-phosphate

KW - Tribology of rare earth

UR - https://www.scopus.com/pages/publications/0036622508

M3 - 文章

AN - SCOPUS:0036622508

SN - 0367-6234

VL - 34

SP - 324-328+332

JO - Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology

JF - Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology

IS - 3

ER -

Study on tribology of oil-soluble lanthanum (neodymium) dialkyldithiophosphates

Abstract

Keywords

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