新澳门金沙网站网址:Breaking point

日期:2019-03-07 10:03:01 作者:乐浪瘫 阅读:

Its always hard to predict when brittle materials will break. But now a team at the University of California at Santa Barbara has produced a laminated ceramic with a predictable minimum strength (Science, vol 286, p 102). Ceramics are strong and can withstand high temperatures, but their uncertain failure points meant that they couldn’t be used in structural components. Fred Lange’s group laminated alternate thick layers of aluminium oxide and thin layers of aluminium silicate to create slabs that fail at consistent stress levels. The thin layers, held under compressive strain, block the propagation of the cracks that cause failure,