Search results

The raw materials were milled to obtain a fine-grained particle size distribution.
The number of samples at each test was eight.

Experimental Procedures The workpiece material used for experiments was Inconel 718 (10 mm in thickness) and ground to parallel faces with a diamond-grain resin-bond grinding wheel.
The S/N ratio of the smaller the better characteristic can be expressed as ∑=−= n i i S y n �S 1 21 log10)/( (1) where n is the number of repetitions of the experiment and iy is the average measured value of the experimental data i.

In the region from periphery to a certain distance inside the compact, microstructure showed grains of Al particles surrounded by SiC particles, as seen in Figs. 2(a, c) But at the center of Table 1.
Number of studies conducted on commerical aluminum-based composite systems revealed a decrease in ductility with an increase in crack initiation (stress accumulation) sites such as the amount of SiC particulates [17,18].

The size of crystal boundary is small and the grain crystal is diffuse so that the flaws can not easiyl come into being and extend.
This technology has been used in a number of hydropower plants and plays an important role in the restoration of the turbine WC protective.

Multi-wave cycle period is set to an odd number, for example: 7,9,11, etc.
It can be known from Figure 7 that the average size of powder after grinding is 0.197μm, it confirms that this high vibration intensity system can refine grain, improve production capacity, shorten the grinding time, and obtain better crushing effect with a shorter time.

It was assigned to the reduction of energy transfer which was caused by the gathering of rare earth ions in the boundary of grain and also the weak interaction of charge carriers and doping ions due to the lower solubility of rare earth ions in the ZnO materials [8].
Obviously, after loading the number of positive net charge of La is increased, indicating that electrons of La atom are transferred to O atoms.

The calculated temperature is range from 1000 to 4000K, and the numbers marked in figure are corresponding to above reactions from (3) to (7).
The higher saturation is advantageous to form rod-like Si3N4 crystal or grain with low length-diameter ratio while form Si3N4 whisker with high length-diameter ratio under lower saturation.

It showed a single phase of bismuth layer-structured compounds with layer number m = 2 and the relative density to the theoretical density was higher than 95%.
This result indicates that alignments of spontaneous polarization in ceramic grains are progressing with increasing poling time until 10 min.

Magnetic measurements were performed in the temperature range 2 - 300 K and magnetic field up to 6 T by means of extraction magnetometer (Quantum Design PPMS) in the form of powder sample with randomly oriented grains fixed by a glue.
All atoms in the structure have high coordination numbers: 22 for the rare-earth component, 15 for indium, and 12 for nickel.

Introduction In recent years, because of a number of good service properties such as excellent wear resistance, heat resistance, large neutron capture cross section and corrosion resistance, much attention is paid to high boron white cast iron, which is used as a new wear-resistant materials [1-3], nuclear power generation materials [4] and corrosion resistant materials in liquid zinc [5].
The crack propagation along the grains will cause the cleavage fracture to appear.