2016 Fiscal Year Final Research Report
Development of wear-resistant aluminum alloy by multilayer coating with gradient hardness at nano-scale thickness
| Project/Area Number |
25420005
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Materials/Mechanics of materials
|
|---|
| Research Institution | Ibaraki University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2013-04-01 – 2017-03-31
|
| Keywords | ダイヤモンドライクカーボン / アルミニウム合金 / 表面改質 / トライボロジー / UBM sputtering / 硬度傾斜膜 |
|---|
| Outline of Final Research Achievements |
The purpose of this research is to improve the adhesion between the DLC film and Al alloy by only in the film depositing process by UBMS equipment and to create Al alloy which can withstand harsh environments used at dry sliding.First, we clarified the effect of UBMS film depositing conditions on film hardness, elastic modulus and film depositing rate, and could be deposited hardness gradient AlN film and hardness gradient AlCrN film with film thickness and hardness controlled step by step on Al alloy.Next, it was revealed that Al alloy having a hardness gradient AlN film as the intermediate layer and a DLC layer on the outermost surface shows a low friction coefficient and wear life is improved comlared to DLC having no gradient AlN film. Furthermore, it was clarified that the DLC/AlNG film does not lower the fatigue strength reliability. Based on the above, the Al alloy developed in this research is expected to be used for sliding machines component.
|
| Free Research Field |
表面改質，破壊力学，材料力学，トライボロジー
|
