A15 road (England) A15 road (England) The A15 is a major road in England. It runs north from Peterborough via Market Deeping, Bourne, Sleaford and Lincoln along a variety of ancient, Roman, and Turnpike alignments before it is interrupted at its junction with the M180 near Scawby. The road restarts east, and then continues north past Barton-upon-Humber, crossing the Humber on the Humber Bridge before terminating at Hessle near Kingston upon Hull. According to the AA, the route is long, and should take 2 hours. Norman Cross – Bourne takes 33 minutes, Bourne to Lincoln takes 46 minutes and Lincoln to the Humber
A15 phases A15 phases The A15 phases (also known as β-W or CrSi structure types) are series of intermetallic compounds with the chemical formula "A""B" (where A is a transition metal and B can be any element) and a specific structure. Many of these compounds have superconductivity at around , which is comparatively high, and remain superconductive in magnetic fields of tens of teslas (hundreds of kilogauss). This kind of superconductivity (Type-II superconductivity) is an important area of study as it has several practical applications. The first time that A15 structure was observed was in 1931 when an electrolytically deposited layer of