Sendust

Sendust is a magnetic metal powder that was invented by <a href="/facts/Hakaru_Masumoto/77XRMypE">Hakaru Masumoto</a> at <a href="/facts/Tohoku_Imperial_University/ec7m7vYy">Tohoku Imperial University</a> in <a href="/facts/Sendai/gG35qfWN">Sendai</a>, <a href="/facts/Japan/U5mz0SRT">Japan</a> circa 1936 as an alternative to <a href="/facts/Permalloy/FkJSmCnY">permalloy</a> in <a href="/facts/Inductor/YnfAXB3x">inductor</a> applications for telephone networks. Sendust composition is typically 85% <a href="/facts/Iron/QK1JYy8E">iron</a>, 9% <a href="/facts/Silicon/cgWx0hdr">silicon</a> and 6% <a href="/facts/Aluminium/7wmR8jYE">aluminium</a>. The powder is <a href="/facts/Sintered/Y4eGLzFf">sintered</a> into cores to manufacture inductors. Sendust cores have high <a href="/facts/Magnetic_permeability/GA7CcRLU">magnetic permeability</a> (up to 140 000), low loss, low coercivity (5 A/m) good temperature stability and saturation flux density up to 1 T.
Due to its chemical composition and crystallographic structure Sendust exhibits simultaneously zero <a href="/facts/Magnetostriction/hkma4mTU">magnetostriction</a> and zero <a href="/facts/Magnetocrystalline_anisotropy/AqMyac3R">magnetocrystalline anisotropy</a> constant K1.
Sendust is harder than permalloy, and is thus useful in abrasive wear applications such as magnetic <a href="/facts/Recording_head/54Jx7ImE">recording heads</a>.

Sendust open-in-new

Sendust