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Corrosion Resistance of the Austenitic Stainless Steels in Chemical Environments

Original Research, B1

Rio M, Tanaka O., Ishichi S.

Sci. J. Mech. Ind. Eng., 2(1): 01-04, 2013

ABSTRACT: The quantitative data secured in corrosion tests are often of a very low order of magnitude. When the corrosion rate is of the order of less than 0.1 mils penetration per year, the actual numbers carry little significance. If, for example, a test indicates a corrosion rate of 0.1 mils penetration per year for Steel A, and .002 for Steel B, it should not be concluded that Steel A is twice as good as Steel B, but rather that both steels are entirely suitable for service in the environment.
Key Words: Corrosion Resistance, Chemical Environments, Stainless steel

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Polymer Nanocomposites: Processing and Manufacturing

Original Research, B2

Mohammadzadeh Gheshlaghi R.

Sci. J. Mech. Ind. Eng., 2(1): 05-11, 2013

ABSTRACT: This review discussed polymer nanocomposite manufacturing techniques including, In situ intercalative polymerization, Exfoliation-Adsorption, Melt Intercalation. In addition to presenting the scientific framework for the advances in polymer nanocomposite research, this review focuses on the scientific principles and mechanisms in relation to the methods of processing and manufacturing. Hence, this review offers a comprehensive discussion on processing and manufacturing concerns for polymer nanocomposites.
Key words: Clay, Nanocomposites, Exfoliation, Intercalation

Evaluation of Intercalation and Exfoliation behaviour in Polymer based clay nanocomposites

Original Research, B3

Haji khanmohammadi H.
Sci. J. Mech. Ind. Eng., 2(1): 12-14, 2013

ABSTRACT: Intercalation and exfoliation phenomena have investigated in the polymer composite that reinforced with clay nanoparticle, so on expressed as nanocomposite materials. When such organoclays are dispersed in a polymer or a polymer precursor, further intercalation can occur and in ideal considerations will lead to complete separation of the layers or exfoliation. Since the improvements in properties of polymer nanocomposites are directly related to the quality of clay intercalation and exfoliation, it is important to study the intercalation and exfoliation. The result of these phenomena is too efficient reinforcing effect because the layers are highly anisometric (1 nm thick and hundreds of nm in diameter) and a relatively small amount of clay can give rise to a very large number of particles with a correspondingly large surface area. To characterization of these phenomena the two techniques, X-ray diffraction (XRD) and transmission electron microscopy (TEM) are commonly used that both provide useful information.
Key words: Nanocomposites, Organoclay, Exfoliation, Intercalation, Polymer

A Ringed Contact Friction and Boundary Lubrication Test instrument design

Original Research, B4

Mahsheykh S. and Robert S. B.
Sci. J. Mech. Ind. Eng., 2(1): 15-17, 2013

ABSTRACT: A simple, inexpensive, easy to use, and very accurate annular contact friction and boundary lubrication tester is described. Data are presented to show excellent reproducibility and extremely low experimental scatter. The system allows the accurate simultaneous measurement of normal load, friction force, ambient fluid temperature, and mean surface contact temperature. Analyses are presented, which are applicable to other testers in addition to the present one, for determining the true mean surface contact temperature from a measured near surface temperature (determined with a thermocouple), and for calculating the viscous drag component of the measured friction (thereby allowing its separation). The tester is particularly well suited for simulating and studying the surface contact phenomena which arise in multiple disc brakes and clutches.
Keywords: Annular Contact Friction, Boundary Lubrication