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TABLE OF CONTENTS

Tribological Studies of Bronze Filled PTFE Polymer

Editorial

Investigations on Polyvinyl Chloride - Carbon Black Blends

Solid particle erosion of plasma sprayed ceramic coatings

Thermal spraying allows the production of overlay protective coatings of a great variety of materials, almost without limitations as to its components, phases and constituents on a range of substrates. Wear and corrosion resistant coatings account for significant utilization of thermal spray processes. Besides being a…

Oxidation - Nitridation of Ni-Cr-Al alloys

A series of alloys containing 24-36 wt pct Cr and 13.5 - 25.0 wt pct Al was reacted with air at 1100°C for 260 h. The products of isothermal reaction were scales of a-Al2O3 plus small amounts of Cr2O3. These grew according to parabolic kinetics, interrupted by episodic weight losses caused by partial spallation. No ni…

Congresos, Seminarios y Cursos

Characterization of the materials of the ceiling that covers the Mayor Sacristhi of Seville's Cathedral

In this article we expose the technics used to characterize the materials of the ceiling that covers the Mayor sacristy of Seville's Cathedral and the causes of the loosening of mortar and stone fragments, we also expose some ways to overcome this fact.

Rupestral paintings of the "La Graja" cave. Pigment characterization and digital image analysis

The present study is part of a wide-ranging research on a group of archaeological sites located in Andalucía (Spain) whose main aim was a better understanding of these sites within a geomorphological, biological and climatic context. This specific investigation concerns the alteration processes affecting the rupestral…

Reactivity of laser-cleaned stones to a SO2 ageing test

In order to study the reaction or susceptibility of Nd:YAG laser cleaned stones to polluted atmospheres, several types of stone, both cemented (limestone) and crystalline (marble, granite), were exposed to an atmosphere having simulated SO2 pollution. The subsequent effects on the specimens were assessed for variation…

Constructive applications of composite gypsum reinforced with Typha Latifolia fibres

The present research analyses the possibility to reinforce gypsum using enea fibres (Typha Latifolia) creating a compound material in wich the fibres contribute to increase mechanical resistance, producing as well a reduction of the weight and a possible regulation of the set time.

Duplex Al-based thermal spray coatings for corrosion protection in high temperature refinery applications

The application of thermal spray coatings has been effective in preventing corrosion of steel and iron products. It has been used in a wide range of applications spreading from the petroleum to the food industry. In this work, the performance and effectiveness of a two-layered aluminum-based thermal spray coating appl…

Filament Winding of Ellipsoidal Structures

Flexural-Shear Wave Propagation in Cracked Composite Beam.

Construction and Experimental Analysis of a Pedestrian Bridge with Concrete Deck and IPC Truss Girder

Simulating steam oxidation of high temperature plant under laboratory conditions: practice and interpretation of data

Specimens of ferritic and martensitic steels have been exposed to steam atmospheres at 550 °C using three different experimental procedures. Slight differences in scale growth kinetics were observed but the major differences were in the morphology of the oxide scales that were formed. The microstructures of the scales…

Composite coatings of titanium-aluminum nitride for steel against corrosion induced by solid NaCl deposit and water vapor at 600 °C

Composite coatings (Ti,Al)N with different Al content were deposited on a wrought martensite steel 1Cr11Ni2W2MoV by reactive multi-arc ion plating. With the addition of Al to the coatings, the crystallographic structure of them changed from B1 NaCl to B4 ZnS, the relevant hardness and adhesive strength firstly increas…

Assessing corrosion in oil refining and petrochemical processing

This paper summarizes the development of an information system used to manage corrosion of metals and alloys by high temperature gases found in many different oil refining, petrochemical, power generation, and chemical processes. The database currently represents about 7.9 million h of exposure time for about 5,500 te…

Nano-structured alloy and composite coatings for high temperature applications

Nano-structured materials often possess special properties that materials with identical compositions but ordinary grain size do not have. This paper reports our work on the surface nano-crystallisation and nano-structured alloy and composite coatings. A number of processing methods including magnetron sputtering, the…

Influence of the starting materials on performance of high temperature oxide fuel cells devices

High temperature solid oxide fuel cells (SOFCs) offer an environmentally friendly technology to convert gaseous fuels such as hydrogen, natural gas or gasified coal into electricity at high efficiencies. Besides the efficiency, higher than those obtained from the traditional energy conversion systems, a fuel cell prov…