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Specialty Chemistry Forums => Materials and Nanochemistry forum => Topic started by: lchou99671 on May 10, 2016, 05:26:37 PM

Title: Need Explanation on an Alloy Sintered Magnet Formula
Post by: lchou99671 on May 10, 2016, 05:26:37 PM
Hi Everyone,

Could someone help to explain in plain English on what this formula represents?
Especially what the subscripts 1-m and 100-x-y-z are?  I understand they are mole fractions, but when combined together, what does it mean? Is it just simple subtraction for the %?  Thanks in advance!!

(Fe1-mTm)100-x-y-zQxRyMz

Fe = Iron
T = at least one element selected from the group consisting of Co and Ni
Q = at least one element selected from the group consisting of B and C
R = at least one rare earth element
M = Nb
x, y, z, and m = mole fraction
2<= x <= 28 (atom %)
8<= y <= 30
0.1 <= z <= 1.0
0 <= m <= 0.5
Title: Re: Need Explanation on an Alloy Sintered Magnet Formula
Post by: Borek on May 11, 2016, 02:59:36 AM
They are used by analogy with standard chemical notation.

XxY1-x means a mixture/alloy with a mole fraction of X equal X and the rest being Y.

Your alloy contains Fe(1-m)(100-x-y-z)