30 Apr '12, 10am

DN Insight: What Rare Earth Shortages Mean for Engineers, Part 4

DN Insight: What Rare Earth Shortages Mean for Engineers, Part 4

When neodymium-based magnets first hit the scene, they offered high flux but over a very limited temperature range. Modifications to the alloys, including the addition of dysprosium, ultimately yielded powerful, thermally robust magnets that enabled the development of motors with far greater torque density and thermal range than possible with traditional materials like aluminum nickel cobalt (AlNiCo) and ferroceramics. Suddenly, engineers had the luxury of motors that were many times smaller and lighter than their conventional counterparts. At the same time, rare earth magnets remained cost-effective courtesy of Chinese suppliers, who soon dominated the market. Figure 1: A speculation bubble has driven up the prices of rare earth elements in the past few years, while the cost of ferrite magnets has remained steady. (Source: NovaTorque) In part four of this five-part design...

Full article: http://www.designnews.com/author.asp?section_id=1386&doc_...

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Blog Archive » A rare image of a pangolin at Bukit Brown

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yesterday.sg 30 Apr '12, 12am

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promotionworld.com 30 Apr '12, 7am

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Blog update!

After an overwhelming and heavy lunch I think it’s time for some walk. We thought why not visit the Strawberry farm since ...

A Little Insight for Earth Day 2012

A Little Insight for Earth Day 2012

jetsongreen.com 22 Apr '12, 10am

*Leave a comment below through the end of Monday, April 23, 2012, to be considered for the random giveaway explained below...