Materials Science

What are the defining discoveries and great developments that are shaping the way we use materials and technologies today? Elsevier's Materials Today magazine has compiled a list of the top ten most significant advances in materials science over the last 50 years. This scientific field investigates the relationship between the structure of materials at atomic or molecular scales and their macroscopic properties. It incorporates elements of applied physics and chemistry. With significant media attention focused on nanoscience and nanotechnology in recent years, materials science has been propelled to the forefront at many universities. It is also an important part of forensic engineering and failure analysis. Materials science also deals with fundamental properties and characteristics of materials. The top ten includes advances that have altered all our daily lives. Some have completely changed the research arena, and others have opened up new possibilities and capabilities.

Surprisingly, top of the list is not a research discovery, but a way of organizing research priorities and planning R&D. The International Technology Roadmap for Semiconductors (ITRS) drives the incredible progress of the microelectronics industry by setting out goals for innovation and technology needs. A mixture of science, technology, and economics, it is hard to see how the ITRS could do better in driving forward advances in this area.

Radical materials advances can drive the creation of new products or even new industries, but stable industries also employ materials scientists to make incremental improvements and troubleshoot issues with currently used materials. Industrial applications of materials science include materials design, cost-benefit tradeoffs in industrial production of materials, processing techniques (casting, rolling, welding, ion implantation, crystal growth.

Besides material characterization, the material scientist/engineer also deals with the extraction of materials and their conversion into useful forms. Thus ingot casting, foundry techniques, blast furnace extraction, and electrolytic extraction are all part of the required knowledge of a metallurgist/engineer. Often the presence, absence or variation of minute quantities of secondary elements and compounds in a bulk material will have a great impact on the final properties of the materials produced, for instance, steels are classified based on 1/10 and 1/100 weight percentages of the carbon and other alloying elements they contain. Thus, the extraction and purification techniques employed in the extraction of iron in the blast furnace will have an impact of the quality of steel that may be produced.

The overlap between physics and materials science has led to the offshoot field of materials physics, which is concerned with the physical properties of materials. The approach is generally more macroscopic and applied than in condensed matter physics. See important publications in materials physics for more details on this field of study.

Materials science studies what makes up our world -- the metals, semiconductors, plastics we use to make all our devices, products, and technologies. It can be how to make smaller, faster transistors to give more powerful computers; understanding the electrical properties of polymers to produce cheap displays for cell phones; or analyzing how tissues in the body bond to medical ...