Indentation hardness and scratch tests are common techniques used in industries laboratories to determine the mechanical properties of thin films. Here, we propose a relative value elastic modulus films composed mixture polydimethylsiloxane polymeric silica with self-healing effects. For this study, homemade nano-indenter nano tester have been designed microscope scanning stage allowing carryin...

Introduction: Resin composites are an important part of restorative treatment in modern dentistry. There are many trademarks available in Iran market and physico-chemical properties of many of these resin composites are not evaluated yet. This study was carried out to evaluate the physico-chemical properties of four available resin composites and also to assess the effect of aging on their prop...

In this present paper, the mechanical properties of σ-phase and its effect on 304H austenitic stainless steel after servicing for about 8 years at 680–720 °C were studied by nano-indentation test, uniaxial tensile impact test. The results showed that nano-hardness (H), Young’s modulus (E), strain hardening exponent (n), yield strength (σy) 14.95 GPa, 263 0.78, 2.42 respectively. presence increa...

The purpose of this experiment was to determine the hardness values of the hybrid layer and its surroundings through the continuous use of a microhardness measuring device. Black's Class V cavities were prepared in nine dog teeth. The cavities were divided into four groups according to the dentin adhesive system applied. The adhesive systems were: "Bond One System", "Liner Bond II sigma System"...

We present an approach for producing complex nanoscale patterns by integrating computer-aided design (CAD) geometry processing with an atomic force microscope (AFM) based nanoindentation process. Surface modification is achieved by successive nano-indentation using a vibrating tip. By incorporating CAD geometry, this approach provides enhanced design and patterning capability for producing geom...

The present study demonstrates the evolution of eutectic microstructure in arc-melted (Zr0.76Fe0.24)100-xNbx (0 ≤ x ≤ 10 atom %) composites containing α-Zr//FeZr₂ nano-lamellae phases along with pro-eutectic Zr-rich intermetallic phase. The effects of Nb addition on the microstructural evolution and mechanical properties under compression, bulk hardness, elastic modulus, and indentation fractur...

In this study, magnesium composites with nano-size boron nitride (BN) particulates of varying contents were synthesized using the powder metallurgy (PM) technique incorporating microwave-assisted two-directional sintering followed by hot extrusion. The effect of nano-BN addition on the microstructural and the mechanical behavior of the developed Mg/BN composites were studied in comparison with ...

Abstract Recently, graphene oxide (GO) is one of the nanomaterials that enhance performance cement-based materials. In this paper, effects different mass GO on workability and mechanical properties UHPC studied, its mechanism explored by micro-nano analysis methods such as XRD, SEM, MIP nano indentation. The results show that, compared with reference group, 0.04% addition reduces fluidity UHPC,...

Nano-indentation with spherical indenters is a test technique largely used to determine the elastic–plastic behavior of very small volume material. In this work, indentation size effects under were investigated for Fe9Cr model alloys and reduced activation tempered martensitic steel Eurofer97. Experimental tests finite element method (FEM) simulations performed. Results analysis experimental re...

In this work, a systematic study of the viscoelastic properties of hydrogels based on polyethylene glycol diacrylate (PEG-DA) is presented. In addition to artificial PEG-DA-based hydrogels, natural hydrogels in the form of human articular cartilage were examined. Specimens were (unconfined) compression tested under static and dynamic load. Besides this, instrumented indentation tests with diffe...