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Abstract
Destructive and non-destructive methods have been used for the determination of micro-traces of antimony in high-purity silicon powder. The destructive method was based on sub-stoichiometric radio-activation analysis with solvent extraction using BPHA and cupferron as organic reagents. The antimony contents in high-purity silicon can be determined by the proposed method.
A new non-destructive method was developed for the detection of refrigerant leakage at an evaporator's inflow. Nitrogen and oxygen gas were suc ....etc

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ACOUSTIC EMISSION & NDT ENGINEERING SERVICES

An important goal for Envirocoustics is the search for excellence through innovative R&D in NDT and Acoustic Emission. The continuous R&D conducted by the company targets the development of unique Acoustic Emission and NDT applications and instrumentation, and has resulted in numerous Scientific Publications.

Additionally, Envirocoustics has close cooperation, through direct contacts and/or joint R&D projects, with universities, institutes and industrial partners in order to expand its R&D goal ....etc

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NDT TESTS ON CONCRETE

Rebound Tests
The rebound hammer is a surface hardness tester for which an empirical
correlation has been established between strength and rebound number.
The only known instrument to make use of the rebound principle for
concrete testing is the Schmidt hammer, which weighs about 4 lb (1.8 kg)
and is suitable for both laboratory and field work. It consists of a springcontrolled
hammer mass that slides on a plunger within a tubular housing.
The hammer is forced against the surface of the concrete by ....etc

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Ceramic Ball Bearing Performance Tests



A New Ball Bearing

INTRODUCTION:
Want to save a *million barrels of petroleum a day by simply changing to a more
efficient ball bearing in machinery? Sounds too good to be true, but it s possible with
new materials available today.
Tribology The science of friction and wear.
If we look at the surface finish of a metal ball or race very closely, peaks and valleys
appear over these surfaces. It is the job of fluid lub ....etc

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The study of micro cracks in concrete is very important to understand its behavior under loading and to improve this material. The direct observation in a scanning microscope is not a suitable method because the concrete is subject to drying shrinkage. Another indirect and non destructive method of observation by SEM is proposed. With this method using a single replica the micro cracks of concrete can be observed better than 0.5 m. ....etc

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Definition of NDT
The use of noninvasive techniques to determine the integrity of a material, component or structure or quantitatively measure some characteristic of an object.
What are Some Uses of NDE Methods?
Flaw Detection and Evaluation
Leak Detection
Location Determination
Dimensional Measurements
Structure and Microstructure Characterization
Estimation of Mechanical and Physical Properties
Stress (Strain) and Dynamic Response Measurements
Material Sorting and Chemical Composition Determi ....etc

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