Polymer sandwich composites laminates are being increasingly used in various components in automotive, maritime and aerospace industry. These materials are used mainly due to their high strength and low weight. Resin Transfer Molding (RTM) is a versatile and efficient manufacturing technique for sandwich composites structures. The process consists of injecting a liquid thermosetting resin into [...]
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Development of cast iron with improved characteristics using computational methods for mold design. (in process)
The use of cast iron in Colombia (including steel) reached quantities of 13.661 tons in 2006 (ANDI, 2009). Despite the widespread use of these materials, there is a lack of research and innovation in the area of iron foundries to keep the pace with international. The existing ductile cast iron products in the national market [...]
Degradability determination of polymer blends: Thermoplastic starch/Low density Polyethylene and Thermoplastic starch/Polyhidroxybutyrate (PHB)
Biodegradable polymers have been developed as a way to substitute synthetic polymers and avoid their excessive use. However, the raw materials that offer biodegradability in a short term do not exhibit the best physical properties, while the synthetic biodegradable polymers present good properties with the setback of their high cost to be used massively. These [...]
ABSTRACT The importation of rubbers is a common activity within the national industry, who defend the use of this type of raw material for its cost and properties. The properties of national produced rubber has not been widely studied, which reduces the credibility of such products. In this project some rubber produced in Colombia will [...]
At the beginning of the 20th Century it was discovered that it was possible to increase the mechanical properties of aluminum alloy after a heat treatment just leaving the material at room temperature for some time. It was later concluded that this effect was caused by precipitation hardening followed by aging, which formed a finely dispersed precipitate that was not possible to resolve with an optical microscope. It was not until the development of X ray diffraction and electron microscopy techniques when a real understanding of the precipitate nature was achieved. This process of heat treating is performed following three stages: i) Solid solution treatment, ii) quenching, and iii) aging. The first aluminum alloys developed using this heat treatment where those which used copper (Cu) and Magnesium (Mg). These alloys showed a limited solubility reduction with a temperature decrease. Some researchers have argued that Silver addition to these alloys increases the mechanical properties of the alloys.