Search results

The greater the number of electrons and ions colliding with the workpiece, the bigger the micro-hole expansion.[20] The variations of overcut for various parameters are shown in Fig. 5.It has been observed from Fig 5a that the overcut increases with the increase of gap voltage.
Machining with Cu electrode, results in fairly uniform and visible recast layer and a heat affected zone of fine grained structure.

The references are to be numbered in the order in which they are cited in the text and are to be listed at the end of the contribution under a heading References, see our example below.
[4] Sikorskii O.N.: Study of corrosion resistance of fine-grained concretes on alkali activated binders for agricultural constructions PhD thesis Kyiv 1970, 24 p

The NCs exhibit exceptional properties owing to three effects, such as small size effect, large grain boundary effect and quantum confinement effect.
Physical and chemical methods can both be employed for this, while chemical methods provide a number of benefits due to their relative simplicity.

Sintering: Sintering of powder sequentially involves the establishment and growth of bonds between the particles of powder at their areas of contact and migration of the grain boundaries formed at the bonds.
Bonds formed between the particles during sintering and the number of particle bonds increase as the temperature increases.

Wheat flour with the grain size of 20 μm or smaller was fully blown at the strip using compressed air (0.589 MPa).
The components (knots ui) of the vector U  form a non-decreasing sequence of real numbers ui ≤ ui+1, with i = 0, …, m: ),,,,,,,,,( 1 1 1 1 0 1 0               ns p m pm s i p s p p uuuuuuU      .

In weight using a sensitive electric oven four times, and the wear rate is calculated according to the following formula: - Wear Rats ………… Eq. 2 Where: t: Sliding time (20 min) n: Number of turns of the disc.
And as a result of high temperature a partial melting occurred in some of silicon carbide particles , breaking some of these particles, rearranging them in a more homogeneous manner and fixing them well in the ground of the base metal, in addition to a process of recrystallization and diffusion of the grains of the base material, which led to the improvement of the surface mechanical properties of the prepared composite material as shown in fig. 1,2 and 3, as well as teble. 4. 3-1 The effect of laser surface heat treatment on hardness Table No. (4) illustrate the effect of laser surface heat treatment on the hardness of the composite material prepared from (Al-6061 alloy and SiC particles) and according to the percentage of added reinforcement particles.

SGBEM provides the required number of equations and no additional equations are required as they are in the collocational BEM [9] in some cases.
The mechanism responsible for the development of this kind of process zone can be bridging of long-chain molecules in polymers, bridging of fibers in composites, interlocking of grain boundaries in alloys and ceramics, and so on.

The number of test specimens in each group was 3, and the average values were taken as the mechanical performance parameters. 3.3 Experimental Design To verify the effect of epoxy composite solidifier on the beach sand and examine the mechanical properties of the solidified sand, indoor mechanical tests were designed for determining the compressive strength, flexural strength, and splitting tensile strength, where the curing time, temperature, water content, and other factors were considered.
Eko, Mechanical Improvement of a Fine-Grained Lateritic Soil Treated with Cement for Use in Road Construction, J.

Also, improving biomethane generation from different crops was studied by Kalinichencko et al. [20], and it was revealed that root crops, grain crops, and several forage plants improved biomethane yield.
The peak biogas production from this mixture was attained on day 10 with 33.45 mL/kg VS fed, and this volume was maintained until day 14 because the number of active methanogenic organisms remains constant, and then the volume of biogas produced began to fluctuate and decline until the completion of the retention time.

Another technique is based on acoustic waves penetrating through and/or reflected by air-filled porous materials such as unconsolidated solid beads of grain[69].
Biological methods are not yet used in practice though the number of corresponding patents increases continously[83].