Hirotaka Ojima
Ibaraki University
Surface roughnessOpticsEngineeringFabricationArtificial intelligenceComposite materialWaferMetallurgyMaterials scienceVibrationAcousticsControl (management)Surface (mathematics)GrindingDevelopment (differential geometry)Pulsed laserGrinding wheelComputer visionComputer scienceOptoelectronicsMachiningPhotocatalysisMechanical engineeringImage processing
118Publications
4H-index
78Citations
Publications 120
Newest
#1Wangpiao Lin (Ibaraki University)
#2Jun Shimizu (Ibaraki University)H-Index: 15
Last. Hirotaka Ojima (Ibaraki University)H-Index: 4
view all 5 authors...
Abstract null null In this study, nanoscratch experiments using side-forward multiple scans by friction force microscope with triangular pyramidal monocrystalline diamond tip were conducted on a null null null null ( null 0001 null ) null null null null plane sapphire wafer substrate to clarify the ductile-regime machining mechanism including its anisotropy. Various characteristics, such as scratch force, depth and specific energy for each scratch direction on C-plane of sapphire, were manifeste...
Source
In this study, single groove nanoscratch experiments using a friction force microscope (FFM) with a monocrystalline diamond tip were conducted on a c-plane sapphire wafer to analyze the ductile-regime removal and deformation mechanism including the anisotropy. Various characteristics, such as scratch force, depth, and specific energy for each representative scratch direction on the c-plane of sapphire, were manifested by the FFM, and the results of the specific scratch energy showed a trend of s...
Source
#2Jun ShimizuH-Index: 1
Last. Takeyuki YamamotoH-Index: 5
view all 7 authors...
#1Teppei OnukiH-Index: 7
#2Libo ZhouH-Index: 3
Last. Hirotaka OjimaH-Index: 4
view all 8 authors...
Source
#1Teppei Onuki (Ibaraki University)H-Index: 7
#2Shunsuke Kan (Ibaraki University)
Last. Libo Zhou (Ibaraki University)H-Index: 19
view all 8 authors...
Source
#1Jun Shimizu (Ibaraki University)H-Index: 15
#2Tomotaka Nakayama (Ibaraki University)H-Index: 1
Last. Libo Zhou (Ibaraki University)H-Index: 19
view all 7 authors...
Abstract Improving tribological properties by applying various textured surfaces have been reported by many researchers. In these studies, most utilized surfaces have been textured with lasers. However, such a texturing method contains several problems including thermal effects, formation of pileups, possible dimple shapes, and lower efficiency than mechanical methods. The traditional mechanical texturing methods also have some problems. In this study, an alternative method is developed by using...
6 CitationsSource
#1Yoshiaki Fukahori (Ibaraki University)
#2Jun Shimizu (Ibaraki University)H-Index: 15
Last. Takeyuki Yamamoto (Ibaraki University)H-Index: 5
view all 7 authors...
Source
#1Wentong Lu (Ibaraki University)
#2Libo Zhou (Ibaraki University)H-Index: 19
Last. Takeyuki Yamamoto (Ibaraki University)H-Index: 5
view all 6 authors...
Source
#1Yuki Ichikawa (Ibaraki University)
#2Ken Ishibashi (Ibaraki University)
Last. Hirotaka Ojima (Ibaraki University)H-Index: 4
view all 7 authors...
Source