scholarly journals Toughness Assessment and Fracture Mechanism of Brittle Thin Films Under Nano-Indentation

10.5772/64117 ◽  
2016 ◽  
Author(s):  
Kunkun Fu ◽  
Youhong Tang ◽  
Li Chang
Keyword(s):  
Thin Films ◽  
Fracture Mechanism ◽  
Nano Indentation

Nanoclay-reinforced Polyacrylamide Composite: Synthesis, Structural and Mechanical Characterization

2009 ◽  
Vol 1239 ◽  
Author(s):  
Yong Sun ◽  
Zaiwang Huang ◽  
Xiaodong Li
Keyword(s):  
Thin Films ◽  
Deformation Behavior ◽  
Mechanical Characterization ◽  
Interfacial Strength ◽  
Localized Deformation ◽  
Nano Indentation ◽  
Atomic Force ◽  
Nanocomposite Thin Films ◽  
Synthesized Materials

AbstractA facile electrophoretic deposition method was successfully applied to achieve novel nanoclay-reinforced polyacrylamide nanocomposite thin films. A special curled architecture of the re-aggregated nanoclay-platelets was identified, providing a possible source for realizing the interlocking mechanism in the nanocomposites. The curled architecture could be the result from strain releasing when the thin films were peeled off from the substrates. Through micro-/nano-indentation and in situ observation of the deformation during tensile test with an atomic force microscope (AFM), the localized deformation mechanism of the synthesized materials was investigated in further details. The results implied that a localized crack diversion mechanism worked in the synthesized nanocomposite thin films, which resembled its nature counterpart-nacre. The deformation behavior and fracture mechanism were discussed with reference to lamellar structure, interfacial strength between the nanoclays and the polyacrylamide matrix, and nanoclay agglomeration.

Nano-indentation and nano-scratching of pure nickel and NiTi shape memory alloy thin films: an atomic-scale simulation

2021 ◽  
Vol 736 ◽  
pp. 138906
Author(s):  
Zenglu Song ◽  
Xiao Tang ◽  
Xiang Chen ◽  
Tao Fu ◽  
Huanping Zheng ◽  
...  
Keyword(s):  
Thin Films ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Pure Nickel ◽  
Atomic Scale ◽  
Niti Shape Memory Alloy ◽  
Nano Indentation

A Simple Method of Tip Shape Calibration for Nano-Indentation Test of Thin Films

2002 ◽  
Vol 750 ◽  
Author(s):  
Koichiro Hattori ◽  
Junhua Xu ◽  
Hidetoshi Nakano ◽  
Isao Kojima
Keyword(s):  
Thin Films ◽  
Contact Stiffness ◽  
Simple Procedure ◽  
Single Crystal Silicon ◽  
Indentation Test ◽  
Fused Silica ◽  
Shape Effect ◽  
Crystal Silicon ◽  
Simple Method ◽  
Nano Indentation

ABSTRACTWe have evaluated the hardness and elastic properties of thin films by using a simple procedure to calibrate the tip shape effect of the nano-indentation data. For the simplification, a truncated-shape approximation and linear fit are used to estimate the tip-shape and contact stiffness, respectively, substituting for polynomial area-function and power-law fit. The parameters used in the correction were determined by a fused silica and a single crystal silicon (100) surface. Different film/substrate systems are designed in order to assess these fitted parameters used in the correction. The transition behavior observed from the film to the substrate is well coincide with the other film thickness results, where the indentation depth above 50nm.

scholarly journals Nano-indentation of copper thin films on silicon substrates

1999 ◽  
Vol 41 (9) ◽  
pp. 951-957 ◽  
Author(s):  
S. Suresh ◽  
T.-G. Nieh ◽  
B.W. Choi
Keyword(s):  
Thin Films ◽  
Silicon Substrates ◽  
Nano Indentation

Nano Indentation Response of Various Thin Films Used for Tribological Applications

2014 ◽  
pp. 62-88
Author(s):  
Manish Roy
Keyword(s):  
Thin Films ◽  
Elastic Modulus ◽  
Nano Indentation ◽  
Lubricating Film ◽  
Indentation Response

Various thin films used for tribological applications are classified under four heads. Based on their load vs. displacement curves, which have some characteristics features, the ratio of nanohardness to elastic modulus and the ratio of cube of nanohardness to square of elastic modulus are evaluated in this chapter. It is demonstrated that depending on the type of film used, these ratios vary within a certain range. For soft self-lubricating films, these ratios are very low; whereas for hard self-lubricating film, these ratios are quite high.

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