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The first phase is usually fibres or grains and mixed with second phase that is known as matrix (examples are polymeric materials) [1].
To understand the effect of controlled parameters on the drilling output, a number of researchers have employed the Taguchi approach in their study [2, 5, 11, 12, 13].
Smaller the better characteristic: SN=-10log1n(y2) (1) where: S/N is the signal to noise ratio; n is the number of observations; and y is the quality characteristic; Response Parameter.

The addition of zirconia grains in the alumina matrix increases the flexural strength and fracture toughness of the material [8,9].
The range of wave numbers 1764–1385 cm-1 shows Zr–OH bending vibrations, namely at the peaks of the spectrum 1641 and 1539 cm-1 [14,15].
Acknowledgment These works were supported by Doctoral Dissertation Research (PDD) Ministry of Education and Culture 2022 with contract number: 1425/PKS/ITS/2022.

A number of important precision tubes are used as the key components in rocket, plane and other aircraft, such as aircraft engine, corrugated pipe and conduit [1-2].These pipes require high strength, high toughness, high temperature properties, creep-resisting, fatigue resistance, corrosion resistance and high damage tolerance.
Thus uniform microstructure with fine grain can be obtained.
Compared with the traditional stamping and welding processes, hydroforming has many advantages, such as reducing weight and saving material; reducing the number of parts and dies; reducing the post treatment including machining and welding; the strength and stiffness improved, especially the fatigue strength.

These are composite materials, which consist of hard carbide particles (70-97% of total composition and 0.4-10 µm grain size) bonded together by a metallic binder through the process of sintering or Hot Isostatic Pressing (HIP).
The numbers increase with the loss of hardness, wear resistance and cutting speed and with the gain of toughness, bending strength and feed speed.
The number of teeth of a milling cutter will determine the feed rate.

Those tests were carried out for fine grained materials machined in conventional way by milling and cutting by metallographic saw.
Thus slightly lower numbers of cycles to fracture attained with the SFT samples are expected.
Comparison of sub-sized specimens made by different technologies shown different behaviour at lower number cycles to fracture.

Introduction For slice mining of thick coal seams in the early time, mining and management is relatively backward, resulting in a large number of coal resources residue.[1]We should recycle the resources, but its occurrence conditions are relatively complex.[2]especially early digging generating irregualr goaf resulting in certain limitations in on-site detection.
Most of the coal seam roof are siltstones and mudstones, its old roof is a layer of fine-grained sandstones.
Thickness(m) Distance(m) Structure Roof lithology Floor lithology Stability level Admissibility MIN-MAX AVE MIN-MAX AVE MIN-MAX number of interlayer 2 4.53-8.65 7.06 0.55-3.30 2.24 0-5 Mudstone/Siltstone Siltstone/Mudstone/Fine sandstone Stable ALL 3 0.55-1.63 0.91 0-2 Mudstone/Siltstone Siltstone/Mudstone Stable ALMOST Tab.2 Characteristics of Coal seam Roof and Floor in Maozequ Mine Coal seam No.

However, the increasing of Al addition will restrict grains growth.
Acknowledgment The authors gratefully acknowledge the foundation by the National Natural Science Foundation of China (NSFC) with the project number 50775045, Guangdong Natural Science Foundation for Team Project and the Project of Dongguan Science & Technology with the project number 200701109.

Lightweight aggregate was obtained from Jiangmen with a grain size of 3-8mm and a saturated water absorption rate of 44.30%.
In Fig. 5 (b), there were a large number of parallel rhombohedral crystal 15 mm from the crack mouth.
A large number of amorphous products containing Ca and Si also appeared in the crack.

Strong textures persist even if dynamic recrystallization occurs, and shear textures of dynamically recrystallized grains have been observed in the weld zone [1].
Texture evolution has been calculated for the shown positions, numbered from 1 to 8 (bottom and top parts).
Each number specifies a position in the outlet where the textures are calculated.

The distributions of iron loss and magnetic flux inside a magnetic plate and grain-oriented silicon steel lamination are certainly not uniform; especially the eddy current loss induced by the normal magnetic flux is concentrated in a thin surface layer.
The number of turns of each exciting coil is 300.
We can be calculated by (4) (4) Where NE and V (e) denote the total number of elements in non magnetic copper plate and the volume of element e, respectively.