Excellent Seizure and Friction Properties Achieved with a Combination of an a-C:H:Si DLC-Coated Journal and an Aluminum Alloy Plain Bearing

被引:15
|
作者
Iwata, Takumi [1 ]
Oikawa, Masakuni [2 ,3 ]
Chida, Riki [1 ]
Ishii, Daijiro [2 ,3 ]
Ogihara, Hidemi [1 ]
Mihara, Yuji [2 ,3 ]
Kano, Makoto [3 ]
机构
[1] Tokyo City Univ, Grad Sch, Mech, Setagaya Ku, 1-28-1 Tamazutsumi, Tokyo 1588557, Japan
[2] Tokyo City Univ, Dept Mech Engn, Setagaya Ku, 1-28-1 Tamazutsumi, Tokyo 1588557, Japan
[3] Tokyo City Univ, Res Ctr High Efficiency Hydrogen Engine & Engine, Adv Res Labs, Setagaya Ku, 1-28-1 Tamazutsumi, Tokyo 1588557, Japan
关键词
diamond-like carbon; a-C; H; Si; engine; crank journal; aluminum alloy plain bearing; seizure; friction; acoustic emission; adhesion; CARBON COATINGS; OIL;
D O I
10.3390/coatings11091055
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Friction occurring between the crank journal and main bearings accounts for a large share of the mechanical losses of automotive engines. The effects of higher in-cylinder pressures and narrower bearings have raised the specific load applied to bearings, making it essential to secure sufficient seizure resistance as well. For the purpose of meeting both requirements, we have endeavored to reduce friction and improve seizure resistance by applying a diamond-like carbon (DLC) coating to the crank journal. In the present study, a bearing tester was used that has received international standard certification from the International Organization for Standardization for reproducing the sliding behavior occurring between the crank journal and main bearings in actual engines. Test results indicated that a silicon-containing hydrogenated amorphous carbon (a-C:H:Si) DLC-coated journal showed a definite friction reduction and a marked improvement in seizure resistance. An acoustic emission (AE) analysis revealed that an adhesion-induced AE peak observed for a steel journal was not seen for the DLC-coated journal. Additionally, tin and aluminum elements in the bearing material that were transferred to and observed on the sliding surface of the steel journal were not seen on the DLC-coated journal. Accordingly, the low affinity of the DLC coating with these metal elements presumably led to the clear friction reduction and superior seizure resistance displayed by the DLC coating.
引用
收藏
页数:15
相关论文
共 4 条
  • [1] Seizure and Friction Properties of the DLC Coated Journal and Aluminum Alloy Bearing
    Ogihara, Hidemi
    Mihara, Yuji
    Kano, Makoto
    TRIBOLOGY ONLINE, 2020, 15 (04) : 241 - 250
  • [2] Corrosion Resistance of 2024 Aluminum Alloy Coated with Plasma Deposited a-C:H:Si:O Films
    Tavares Mascagni, Daniela Branco
    Pires de Souza, Maria Eliziane
    de Alvarenga Freire, Celia Marina
    Silva, Selma Luiza
    Cipriano Rangel, Rita de Cassia
    da Cruz, Nilson Cristino
    Rangel, Elidiane Cipriano
    MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, 2014, 17 (06): : 1449 - 1465
  • [3] Effect of humidity on the friction properties of a-C:H and a-C:H:Si films deposited by PECVD employing microwave sheath-voltage combination plasma
    Tanaka, Ippei
    Ikeda, Tomoya
    Nakano, Toshimitsu
    Kousaka, Hiroyuki
    Furuki, Tatsuya
    JAPANESE JOURNAL OF APPLIED PHYSICS, 2019, 58 (SA)