Search results

Introduction Reaction-bonded silicon carbide (RB-SiC) is a recently developed non-oxide ceramic material which is receiving intensive industrial interests due to a series of superior properties such as high hardness (Mohs 9), high thermal conductivity (as high as copper's) and chemical stability (highly inert to various acids) of this material [1].
Because surface microstructures strongly affect the machining behavior, before experiment, the as-received RB-SiC sample surface was firstly examined using scanning electron microscope (SEM).
At low tool feed rates, micro pores dominate the surface texture while at high feed rates, tool feed is a major surface roughness factor.
However, cutting speed may affect the machining behavior, as known in previous studies [12].
Moreover, the two phases are different in mechanical properties.

The results show that the residual stress distribution after the strengthening process of the cold extrusion with the split sleeve is affected by many factors, such as extrusion amount, materials, size and position of the hole, extrusion speed, reaming amount, size, and position of bushings, etc., and the conclusions have now tended to be consistent.
The tensile properties are measured by the test at room temperature.
Mechanical constraint formulation: penalty contact method.
Mechanical constraint formulation: kinematic contact method.
Also, the reamer is a rigid body, and no material properties need to be defined.

As concerns delamination phenomena, notice that for the examined case of Apulian tuff masonry arches the bond between masonry support and FRCM reinforcements is a critical aspect, and debonding phenomena may significantly affect the overall strength of the construction.
The obtained values of the main mechanical parameters are: average flexural strength fmf=2.73 MPa, average compressive strength fmc=7.40 MPa, average Young Modulus Em=8100 MPa.
For the other two accelerometers similar values and trends of the dynamic amplification factor have been observed.
It results that down to 4 Hz the dynamic amplification factor gradually decreases from about 1.18 to about 0.72; after 4 Hz a sudden increase is observed, with a peak of about 3.62 at 6 Hz; finally, a decrease of the dynamic amplification factor occurs, until the value 2.74 recorded at 8 Hz.
Moreover, in case of materials having poor mechanical properties like the tuff, also the influence on the dynamic behavior of the elastic deformability of the blocks and of the rounding of the edges of the block due to the impacts and to the low tensile strength of the material should be considered.

Elutriation of particles which has been a major limiting factor in the operation of the conventional fluidized bed is reduced significantly, since the vertical component of velocity is now only a small fraction of the net gas velocity.
From the cold model tests, they concluded that the method of air injection substantially affected the hydrodynamics and fluidization regimes.
Particle Properties and Experimental Configuration.
This may cause significant variation in heat and mass transfer in the bed, affecting the quality of the end product.
[6] Glicksman, L.R., Lord, W.K. and Sakagami, M., “Bubble Properties in Large Particle Fluidized Beds”, Chemical.

The physicochemical properties of the plastics are summarized below: Table 1.
Its unique properties make it widely used in industrial and commercial technologies.
As globally, rapid urban waste growth and inadequate plastic waste management in Azerbaijan are significant factors affecting the environment and climate.
Perspectives on plastic pyrolysis for fuel oil production: Key factors and challenges.
Polymeric materials and properties.

The Use of Power Monitoring and Electron Microscopy in Evaluating the Performance and Fracture Characteristics of Abrasive Grains Jeffrey Badger1,3,a*, Radovan Drazumeric2,3,b and Peter Krajnik2,3,c 1The Grinding Doc, 82 Jane Street, #5B, New York, NY 10014, USA 2Univerisity of Ljubljana, Faculty of Mechanical Engineering, Askerceva 6, Ljubljana, Slovenia 3The International Grinding Institute, 127 W. 83rd St., #424, New York, NY 10024, USA ajeffrey.badger@grindinginstitute.com, bradovan.drazumeric@fs.uni-lj.si, cpeter.krajnik@fs.uni-lj.si Keywords: Abrasives, sintered abrasive, engineered-shape abrasive, fracture, chip-formation, electron microscopy.
Introduction The evaluation of grinding-wheel performance – in particular, abrasive-grit and bond properties – poses specific challenges.
Moreover, the conditions under which the wheel is tested – the “speeds & feeds” – will also greatly affect wheel performance.
The mechanisms behind dulling of abrasive grits depend on numerous factors.
Badger, Factors affecting wheel collapse in grinding, CIRP Annals – Manufacturing Technology. 58/1 (2009) 307-310

Based on the energy-factor method which be used commonly in refineries of China, a method named energy-quality-factor(EQF) is proposed in this paper.
It is a duty, and can also affect the financial performance[3].
The method named energy-quality-factor is described in formula (1).
In formula (1), the denominator is the energy-quality-factor(EQF).
A sample of using the UEQFEC to evaluate the energy consumptions of a refinery The UEQFEC can reflect both the quantity and the quality properties of energy consumption.

Introduction In recent years, the A1N has been a continuing concern as its excellent physical and chemical mechanical properties.
The AIN film has widely band gap and immediate energy band structure, the forbidden bandwidth Eg = 6.2 ev, and has got well optical and electrical properties.
We have focused on this method, that the film properties,especially the surface morphology, is influenced by annealing and deposition parameters.
Consistent structural properties of AIN and.
Temperature dependence of the optical properties in hexagonal A1N [J].

Hydrogen negatively affects the plasticity of titanium and its alloys.
In this case, the δ value of the UFG alloy decreases by a factor of 1.3, while for the FG alloy, δ is almost 2 times less.
Zhu, Fundamentals of Superior Properties in Bulk NanoSPD Materials, Mater.
Miyazaki, Mechanical properties of a medical β-type titanium alloy with specific microstructural evolution through high-pressure torsion, Mater.
Wu, Thermo hydrogen treatment for microstructure refinement and mechanical properties improvement of Ti-6Al-4V alloy, Mater.

Magnetic Nanoparticles: Synthesis and Properties Kishor G.
CoFe2O4 nanoparticles with a 5.5 nm average diameter were obtained when these two factors were fixed to 9 and 3, respectively, by adding water and sodium acetate.
Eckert, Microstructure and mechanical properties of partially amorphous Al85Y8Ni5Co2 plate produced by spray forming, Mater.
Venkateswarlu, Microstructural modifications induced during spray deposition of Al-Si-Fe alloys and their mechanical properties, Mater.
Ojha, Microstructure and mechanical properties of Al–Si alloys produced by spray forming process, Mater.