An Investigation of Thin-Film Coating/Substrate Systems by Nanoindentation

1998 ◽  
Vol 120 (2) ◽  
pp. 154-162 ◽  
Author(s):  
Jackie Li ◽  
Erik T. Thostenson ◽  
Tsu-Wei Chou ◽  
Laura Riester
Keyword(s):  
Thin Film ◽  
Indentation Load ◽  
Field Analysis ◽  
Hard Coating ◽  
Hard Substrate ◽  
Contact Radius ◽  
Soft Substrate ◽  
Dlc Coating ◽  
Material Systems ◽  
Load Displacement

The indentation load-displacement behavior of three material systems tested with a Berkovich indenter has been examined. The materials studied were the substrate materials—silicon and polycarbonate, and the coating/substrate systems—diamond-like carbon (DLC) coating on silicon, and DLC coating on polycarbonate. They represent three material systems, namely, bulk, soft-coating on hard-substrate, and hard-coating on soft-substrate. Delaminations in the soft-coating/hard-substrate (DLC/Si) system and cracking in the hard-coating/soft-substrate system (DLC/Polycarbonate) were observed. Parallel to the experimental work, an elastic analytical effort has been made to examine the influence of the film thickness and the properties of the coating/substrate systems. Comparisons between the experimental data and analytical solutions of the load-displacement curves during unloading show good agreement. The analytical solution also suggests that the Young’s modulus and hardness of the thin film can not be measured accurately using Sneddon’s solution for bulk materials when the thickness of the film is comparable to the loading contact radius of the indenter. The elastic stress field analysis provides a basis for understanding the experimentally observed delaminations and cracking of the coating/substrate systems.

Finite element analysis of residual stress and interlayer in hard coating/interlayer/soft substrate system during nanoindentation

2008 ◽  
Vol 23 (5) ◽  
pp. 1358-1363 ◽  
Author(s):  
Liuhe Li ◽  
Lan Yin ◽  
Paul K. Chu
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Hard Coating ◽  
The Finite Element Method ◽  
Soft Substrate ◽  
Element Analysis ◽  
Load Displacement ◽  
Thin Interlayer ◽  
Film Substrate

The mechanical properties of thin films are frequently evaluated using nanoindentation. The finite element method (FEM) is very effective for investigating the stress and strain fields of the film–substrate system during nanoindentation. However, the role of residual stress and the thin interlayer between the film and substrate is not well known, especially when the hard coating/interlayer/soft substrate are considered together. In this work, the FEM is used to investigate the load-displacement behavior of the hardness of the hard coating/interlayer/soft substrate system. The load–displacement process is simulated, and the effects of different residual stresses and interlayer thicknesses are discussed.

Numerical Derivative Analysis of Load-Displacement Curves in Depth-Sensing Indentation

2003 ◽  
Vol 791 ◽  
Author(s):  
Tom Juliano ◽  
Vladislav Domnich ◽  
Tom Buchheit ◽  
Yury Gogotsi
Keyword(s):  
Thin Film ◽  
Single Crystal Silicon ◽  
Indentation Load ◽  
Fused Silica ◽  
Depth Sensing ◽  
Crystal Silicon ◽  
Derivative Analysis ◽  
Loading And Unloading ◽  
Load Displacement ◽  
Carbide Derived Carbon

ABSTRACTThe use of load-displacement derivative behavior and power-law curve fitting is applied to find the location of events for a number of different materials during depth-sensing indentation. Load-displacement curves for Berkovich indentations on fused silica, fullerene thin film on sapphire, CdTe thin film on silicon, single crystal silicon, carbide derived carbon, and a polymethylmethacrylate/hydroxyapatite (PMMA/HA) particle composite are examined. The analysis is applied to quantify the location of different events that occur during material loading and unloading.

Indentation load relaxation experiments with indentation depth in the submicron range

1990 ◽  
Vol 5 (10) ◽  
pp. 2100-2106 ◽  
Author(s):  
W. R. LaFontaine ◽  
B. Yost ◽  
R. D. Black ◽  
C-Y. Li
Keyword(s):  
Indentation Depth ◽  
Metal Films ◽  
Indentation Load ◽  
Hard Substrate ◽  
Flow Properties ◽  
Load Relaxation ◽  
Relaxation Data ◽  
Flow Curves ◽  
Relaxation Experiments

Indentation load relaxation (ILR) experiments with indentation depths in the submicron range are described. Under appropriate conditions, the ILR data are found to yield flow curves of the same shape as those based on conventional load relaxation data. Variations in flow properties as a function of depth in submicron metal films deposited on a hard substrate are detected by the experiments described.

Congratulations! The Best Paper Award 2014

2014 ◽  
Vol 8 (5) ◽  
pp. 623-623
Author(s):  
Editorial Office
Keyword(s):  
Thin Film ◽  
Permanent Magnet ◽  
Selection Process ◽  
Linear Motor ◽  
Paper Award ◽  
Award Winner ◽  
Dlc Coating ◽  
Future Success ◽  
Automation Technology

The fifth Best Paper Award 2014 ceremony was held in Kasumigaseki, Tokyo, Japan, on August 1, 2014, attended by the winner and IJAT committee members who took part in the selection process. The Best Paper was severely selected from among 84 papers published in Vol.7 (2013). The Best Paper Award winner was given a certificate with a nearly US$1,000 honorarium. We congratulate the winner and sincerely wish for his future success.   Title: Positioning Characteristics of a MEMS Linear Motor Utilizing a Thin Film Permanent Magnet and DLC Coating Authors: Ryogen Fujiwara, Tadahiko Shinshi, and Minoru Uehara Int. J. of Automation Technology Vol.7 No.2, March, 2013

Improving load-bearing property of hard thin film on soft substrate by elastic modulus distribution design

2013 ◽  
Vol 110 ◽  
pp. 215-217 ◽  
Author(s):  
Lin Qin ◽  
Cuiling Li ◽  
Shipeng Chen ◽  
Chengsong Liu ◽  
Bin Tang
Keyword(s):  
Thin Film ◽  
Elastic Modulus ◽  
Soft Substrate ◽  
Load Bearing

Congratulations! The Best Paper Award 2014

2014 ◽  
Vol 8 (5) ◽  
pp. 623-623
Author(s):  
Editorial Office
Keyword(s):  
Thin Film ◽  
Permanent Magnet ◽  
Selection Process ◽  
Linear Motor ◽  
Paper Award ◽  
Award Winner ◽  
Dlc Coating ◽  
Future Success ◽  
Automation Technology

The fifth Best Paper Award 2014 ceremony was held in Kasumigaseki, Tokyo, Japan, on August 1, 2014, attended by the winner and IJAT committee members who took part in the selection process. The Best Paper was severely selected from among 84 papers published in Vol.7 (2013). The Best Paper Award winner was given a certificate with a nearly US$1,000 honorarium. We congratulate the winner and sincerely wish for his future success.   Title: Positioning Characteristics of a MEMS Linear Motor Utilizing a Thin Film Permanent Magnet and DLC Coating Authors: Ryogen Fujiwara, Tadahiko Shinshi, and Minoru Uehara Int. J. of Automation Technology Vol.7 No.2, March, 2013

Residual stress model for CaF2

2007 ◽  
Vol 22 (10) ◽  
pp. 2796-2808
Author(s):  
Q. Zhang ◽  
J.C. Lambropoulos
Keyword(s):  
Removal Rate ◽  
Indentation Load ◽  
Contact Radius ◽  
Spherical Indentation ◽  
Stress Distributions ◽  
Element Analysis ◽  
Crystalline Anisotropy ◽  
Crystallographic Planes ◽  
Two Stages

Nanoindentation tests and finite element analysis that considers elastic-mesoplastic deformation for single crystals were used to investigate the mechanical properties of CaF2 under spherical indentation. The goal was to gain a better understanding of microfractures and crystalline anisotropy and their effect on the surface quality of CaF2 during manufacturing. In this analysis, indentations of the three main crystallographic planes (100), (110), and (111) were studied and compared to examine the effects of crystalline anisotropy on the load–displacement curves, surface profiles, contact radius, spherical hardness, stress distributions, and cleavage at two stages, namely at the maximum indentation load and after the load had been removed. Our model results were compared with experimental observation of surface microroughness, subsurface damage, and material removal rate in grinding of CaF2.

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