SEM observation of damege mechanism of micro-tribological fracture on hard disk surface

硬盘表面微摩擦断裂损伤机理的SEM观察

• 批准号: 04402022
• 负责人: MURAKAMI Yukitaka
• 金额: $ 19.84万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (A)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04402022/
• 关键词: Fatigue life; Hard disk; Head crash; Friction; Elasto-plastisity; Triangular pyramidal indentation; Young's modulus; Thin film; トライボロジ

(1) In order to evaluate the relative quality of hard disks, two testing methods are introduced in this study : a continuous sliding test and an in-situ reversal pin-on-disk test. These two methods enable one to compare the relative quality of a head-disk interface in a short period of time. The process leading to failure of the hard disk is clearly fatigue. Above a certain critical load, damage occurs easily and quickly. The lubricant layr can have an adverse effect on fatigue life at low sliding speed. It also affects the stability of the frictional coefficient.(2) A particular formulation of the three-dimensional finite-element method is established for the elastic-plastic analysis of a triangular pyramidal indentation. The calculated results are in good agreement with the experimental results. It is shown that the loading portion of the caluculated load-displacement curves can be correlated with Vickers hardness, and the unloading portion, with Young's modulus.

(1)为了评价硬盘的相对质量，本研究引入了两种测试方法：连续滑动测试和现场反转销盘测试。这两种方法使人们能够在短时间内比较磁头-磁盘接口的相对质量。导致硬盘故障的过程显然是疲劳。在一定的临界载荷以上，损伤很容易发生，而且速度很快。在较低的滑动速度下，润滑层会对疲劳寿命产生不利影响。建立了三角锥体压痕弹塑性分析的三维有限元格式。计算结果与实验结果吻合较好。结果表明，计算得到的载荷-位移曲线的加载部分与维氏硬度相关，卸载部分与杨氏弹性模量相关。

项目成果

Y.Murakami: "Elastic analysis of triangular pyramidal indentation by the finite-element method and its application to nano-indentation measurement of glasses" PHILOSOPHICAL MAGAZINE A. 69. 1131-1153 (1994)

Y.Murakami：“有限元法对三角锥压痕的弹性分析及其在玻璃纳米压痕测量中的应用” 哲学杂志 A. 69. 1131-1153 (1994)

Y.Murakami, K.Tanaka, M.Itokazu and A.Shimamoto: "Elastic analysis of triangular pyramidal indentation by the finite-element method and its application to nano-indentation measurement of glasses" PHILOSOPHICAL MAGAZINE,A. 69-6. 1131-1153 (1994)

Y.Murakami、K.Tanaka、M.Itokazu 和 A.Shimamoto：“有限元法对三角锥压痕的弹性分析及其在玻璃纳米压痕测量中的应用”哲学杂志，A。

村上敬宜: "Damage of Hard Disks in Continous Sliding Test" 日本材料学会第7回破壊力学シンポジウム 講演論文集. 123-126 (1993)

Takayoshi Murakami：“连续滑动试验中硬盘的损坏”日本材料学会第七届断裂力学研讨会论文集123-126（1993）。

E.M.Coudert: "DURABILITY TEST AND DAMAGE EVALUATION OF HARD DISKS" Material Science Research International. 1. 37-43 (1995)

E.M.Coudert：“硬盘的耐用性测试和损坏评估”国际材料科学研究。

E.M.Coudert and Y.Yurakami: "DURABILITY TEST AND DAMAGE EVALUATION OF HARD DISKS" Material Science Research International. (1995)

E.M.Coudert 和 Y.Yurakami：“硬盘的耐用性测试和损坏评估”材料科学研究国际。