"Metallic glass" sounds like an oxymoron, but it's Todd Hufnagel's goal. Hufnagel, a researcher at Johns Hopkins University, hopes to create a metallic glass in bulk form with superior strength, elasticity, and magnetic properties that will not crystallize at higher temperatures. A glass is any material that can be cooled from a liquid to a solid without crystallizing. Most metals crystallize as they cool, arranging their atoms into a highly regular spatial pattern called a lattice. If crystallization does not occur, and the atoms settle into a nearly random arrangement, the final form will be a metallic glass. Hufnagel and associates are researching the deformation of glass alloys at high rates; and the phase transformation or crystallization window between liquid and solid states, when the material is soft enough to be molded; as well as new combinations of alloys. "Metallic glass is highly elastic, bending 2 to 3% before it permanently changes shape," Hufnagel says. This makes it a useful material for springs. The first commercial application to date is golf club heads. Mountain bike manufacturers are calling about the possibility of using the material as a shock absorber. Because metallic glass would not shrink, yet is extremely flexible, it may be ideal for injection molding, Hufnagel adds. Other applications: engine parts, electric transformers, and military applications, such as armor-piercing projectiles. FAX: (410) 516-5251.
Science fiction author Isaac Asimov may have the best rules for effective brainstorming and creativity. His never-before-published essay, "On Creativity," recently made it to the Web pages of MIT Technology Review.
Much has been made over the potentially dangerous flammability of lithium-ion batteries after major companies like Boeing, Sony, and Tesla have grappled with well-publicized battery fires. Researchers at Stanford University may have come up with a solution to this problem with a smart sensor for lithium-ion batteries that provides a warning if the battery is about to overheat or catch fire.
In this new Design News feature, "How it Works," we’re starting off by examining the inner workings of the electronic cigarette. While e-cigarettes seemed like a gimmick just two or three years ago, they’re catching fire -- so to speak. Sales topped $1 billion last year and are set to hit $10 billion by 2017. Cigarette companies are fighting back by buying up e-cigarette manufacturers.
Advertised as the "Most Powerful Tablet Under $100," the Kindle Fire HD 6 was too tempting for the team at iFixit to pass up. Join us to find out if inexpensive means cheap, irreparable, or just down right economical. It's teardown time!
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.