The effect of the embedding medium on the nano-indentation measurements of lignocellulosic materi­ als was investigated experimentally using nano-indentation. Both the reduced elastic modulus and the hardness of non­ embedded cell walls were found to be lower than those of the embedded samples, proving that the embedding medium used for specimen preparation on cellulosic material dur­ ing nano-...

Acrylonitrile butadiene styrene (ABS) and polycarbonate (PC) are considered a well-known class of engineering thermoplastics due to their efficient use in automotive, 3D printing, electronics. However, improvement toughness, processability, thermal stability is achieved by mixing together ABS PC. The present study focuses on the understanding surface mechanical characterization acrylonitrile bl...

A comparison is presented between conventional tensile stress-strain curves and those obtained via two methodologies based on (spherical) indentation. The first, termed Instrumented Indentation Technique (IIT), involves conversion of load-displacement data to analytical expressions. This has been done using loads below 1 N (“nano”) in the kN range (“macro”). other procedure, profilometry-based ...

Nano-scratch and nano-indentation were used to determine hardness, elastic modulus, adhesion, friction and wear resistance of chromium oxide coatings in air and in water. The friction coefficient is higher in water, compared to air, and it increases with the applied normal load, although there are no obvious differences in hardness and elastic modulus in air vs. water. A higher normal load incr...

Hard coatings have been adopted in cutting and forming applications for nearly two decades. The major purpose of using hard coatings is to reduce the friction coefficient between contact surfaces, to increase strength, toughness and anti-wear performance of working tools and molds, and then to obtain a smooth work surface and an increase in service life of tools and molds. In this report, we de...