scholarly journals Impact of metal/ceramic interactions on interfacial shear strength: study of Cr/TiN using a new modified embedded-atom potential

2021 ◽  
pp. 110120
Author(s):  
Nisha Dhariwal ◽  
Abu Shama Mohammad Miraz ◽  
W.J. Meng ◽  
Bala R. Ramachandran ◽  
Collin D. Wick
Keyword(s):  
Shear Strength ◽  
Interfacial Shear Strength ◽  
Interfacial Shear ◽  
Embedded Atom ◽  
Metal Ceramic ◽  
Atom Potential

Measurement of the Interfacial Shear Strength of thin Copper Films on Sapphire by Microindentation Experiments

1995 ◽  
Vol 403 ◽  
Author(s):  
G. Dehm ◽  
R. Raj ◽  
M. Rühle
Keyword(s):  
Shear Strength ◽  
Molecular Beam ◽  
Interfacial Shear Strength ◽  
Interfacial Strength ◽  
Interfacial Shear ◽  
Copper Films ◽  
Sapphire Substrates ◽  
Metal Ceramic ◽  
Relative Change ◽  
Ceramic Interfaces

AbstractMicroindentation experiments were carried out on 500 nm thick films of copper grown on sapphire substrates, containing titanium interlayers of different thicknesses. The films were near single crystal and were grown by molecular beam epitaxy. The width of the titanium interlayers was varied from 0.7nm to I 10nm. The load-displacement data obtained from the indentation experiments was analyzed in terms of a new model. Just 0.7nm of titanium produced a 40% increase in the interfacial shear strength. Further increase in the thickness of the titanium interlayers produced only a slightly larger increase in the interfacial strength, suggesting that the measurement reflected the influence of the atomic bonding at the interface. The technique and the model present a simple way to estimate the relative change in the interfacial strength of metal-ceramic interfaces.

scholarly journals Enhanced Interfacial Shear Strength and Critical Energy Release Rate in Single Glass Fiber-Crosslinked Polypropylene Model Microcomposites

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2552 ◽  
Author(s):  
Uwe Gohs ◽  
Michael Mueller ◽  
Carsten Zschech ◽  
Serge Zhandarov
Keyword(s):  
Shear Strength ◽  
Electron Beam ◽  
Energy Release Rate ◽  
Glass Fiber ◽  
Release Rate ◽  
Interfacial Shear Strength ◽  
Glass Fibers ◽  
Critical Energy ◽  
Interfacial Shear ◽  
Critical Energy Release Rate

Continuous glass fiber-reinforced polypropylene composites produced by using hybrid yarns show reduced fiber-to-matrix adhesion in comparison to their thermosetting counterparts. Their consolidation involves no curing, and the chemical reactions are limited to the glass fiber surface, the silane coupling agent, and the maleic anhydride-grafted polypropylene. This paper investigates the impact of electron beam crosslinkable toughened polypropylene, alkylene-functionalized single glass fibers, and electron-induced grafting and crosslinking on the local interfacial shear strength and critical energy release rate in single glass fiber polypropylene model microcomposites. A systematic comparison of non-, amino-, alkyl-, and alkylene-functionalized single fibers in virgin, crosslinkable toughened and electron beam crosslinked toughened polypropylene was done in order to study their influence on the local interfacial strength parameters. In comparison to amino-functionalized single glass fibers in polypropylene/maleic anhydride-grafted polypropylene, an enhanced local interfacial shear strength (+20%) and critical energy release rate (+80%) were observed for alkylene-functionalized single glass fibers in electron beam crosslinked toughened polypropylene.

scholarly journals Advanced Models for Modulus and Strength of Carbon-Nanotube-Filled Polymer Systems Assuming the Networks of Carbon Nanotubes and Interphase Section

Mathematics ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 990
Author(s):  
Yasser Zare ◽  
Kyongyop Rhee
Keyword(s):  
Carbon Nanotubes ◽  
Shear Strength ◽  
Carbon Nanotube ◽  
Interfacial Shear Strength ◽  
Tensile Modulus ◽  
Interfacial Shear ◽  
Filled Polymer ◽  
Polymer Systems

This study focuses on the simultaneous stiffening and percolating characteristics of the interphase section in polymer carbon nanotubes (CNTs) systems (PCNTs) using two advanced models of tensile modulus and strength. The interphase, as a third part around the nanoparticles, influences the mechanical features of such systems. The forecasts agree well with the tentative results, thus validating the advanced models. A CNT radius of >40 nm and CNT length of <5 μm marginally improve the modulus by 70%, while the highest modulus development of 350% is achieved with the thinnest nanoparticles. Furthermore, the highest improvement in nanocomposite’s strength (350%) is achieved with the CNT length of 12 μm and interfacial shear strength of 8 MPa. Generally, the highest ranges of the CNT length, interphase thickness, interphase modulus and interfacial shear strength lead to the most desirable mechanical features.

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