Novel Method for Deposition of Gas-Tight SiC Coatings

A Novel Method for Mitigation of Asphaltene Deposition in the Wellstring

Asphaltene precipitation and deposition is a serious problem in many Iranian fields. The deposited asphaltene results in partial or total blockage of the wellbore and wellstring reducing or completely seizing oil production. This paper studies the asphaltene problem and mitigation methods in wellstring systematically. It presents new approach based on the combination of thermodynam...

Deposition of Nano-Crystalline Fluor-hydroxyapatite Coatings on Titanium Substrates via Sol-Gel Method

      In this investigation, fluor-hydroxyapatite (FHA) film was deposited on a titanium substrate by sol-gel method. Triethyl phosphite, ammonium fluoride and calcium nitrate in ethanol solutions were used respectively as P, F and Ca precursors. Typical apatite structures were obtained for all coatings after dipping and subsequent heat treatment at 550, 700 and 800 ºC, the coating layers were ...

SiC coatings grown by liquid injection chemical vapor deposition using single source metal-organic precursors

Preparation of Ultra Dispersive Glasses for Designing Novel Coatings

In order to attain glasses with ultra dispersions properties, different heavy metal oxides were used. The desired glasses were obtained from the addition of high amounts of PbO and Bi2O3 to B2O3 based glasses. Refractive index measurements were carried out accurately at different wavelengths by the minimum angle of deviation in prisms method employing a spectrometer. Results indicated that, as ...

DEVELOPMENT OF CVD MULLITE COATINGS FOR SiC FIBERS

1.0 Introduction 2.0 Experimental details 2.1 CVD process 2.2 Oxidation Testing 2.3 Cyclic Oxidation Testing 2.4 Corrosion Testing 2.5 Tensile Testing 3.0 Results and discussion 3.1 3.2 3.3 3.4 3.5 3.6 Effect of system parameters 3.1.1 System pressure 3.1.2 Input gas velocity 3.1.3 A1/Si molar ratio Structure of mullite coating Oxidation Testing Cyclic Oxidation Hot Corrosion Tensile Strength 4...