It is not clear that materials that are wear-resistant at the macrosc...Defects cracks and other phenomena that influence material strength a... <a href="http://www.bio-medicine.org/inc/biomed/biology-technology.asp">http://www.bio-medicine.org/inc/biomed/biology-technology.asp</a> http://feeds.bio-medicine.org/latest-biology-technologyDate:2/25/2010 al manufacturing is available.