Thanks for the merited correction. I had a second thought about 4 ms
after I pressed the send button that I had boo-booed with my
terminology. I then said to myself that Werner will correct me!
FYI, liquidus (with a little l) is defined in Oxford:
A line or surface in a phase diagram, or a temperature (corresponding to
a point on the line or surface), above which a mixture is entirely
liquid and below which it consists of liquid and solid in equilibrium.
Also liquidus curve, liquidus surface, liquidus temperature.
and solidus, also with a little s:
I. 1. Hist. A gold coin of the later Roman Empire, originally worth
about 25 denarii. Formerly also, in medieval England, a shilling. ME.
2. An oblique stroke formerly written to separate shillings from
pence, and now used in writing fractions, to separate figures and
letters, or to denote alternatives or ratios. Cf. VIRGULE 1. L19.
II. 3. A line or surface in a binary or ternary phase diagram
respectively, or a temperature (corresponding to a point on the line or
surface), below which a mixture is entirely solid and above which it
consists of solid and liquid in equilibrium. E20.
attrib.: solidus curve, solidus temperature, etc.
eutectic:
L19.
[from Greek eutUktos easily melting, formed as EU- + tUkein melt: see -IC.]
A. noun.
1. A mixture whose constituents are in such proportions that it melts
and solidifies at a single temperature that is lower than the melting
point of the constituents or any other mixture of them. L19.
2. A eutectic point. M20.
B. adjective. Of, pertaining to, or designating a eutectic, its melting
point, or the point representing its melting point in a phase diagram. L19.
A. H. Cottrell This is the ternary eutectic point at which the liquid is
in equilibrium with all three solids.
• eutec"tiferous adjective giving rise to or having a eutectic E20.
• eutectoid noun & adjective (pertaining to or designating) a solid
analogous to a eutectic, having a minimum transformation temperature
between a solid solution and a mechanical mixture of solids E20.
Maybe the blacksmith in Asterix le Gaulois should have been named
Eutectix! :-) (IIRC, it was Automatix)
Brian
Werner Engelmaier wrote:
> Hi Brian,
> GÃŒnter, as usual, did an excellent job explaing what eutectic compositions
> are and what they do. The origin of eutectic compositions and Solidus and
> Liquidus lines comes, to my knowledge, originally from the steel industry.
>
> The reason I write this is that I am surprised that even you have fallen into
> the sloppy language trap.
>
> There are Solidus and Liquidus temperatures for each composition�I capitalize
> them because the properly should be defioned proper nouns even though the OAD
> does not define them as such. However, there is no such word as liquidus as
> in "...will not attain liquidus..." An alloy may become liquid or liquify, but
> cannot become 'liquidus', or even 'liquidous' for that matter.
> One of the reasons people have started this misuse is, IMHO, that often these
> words are not capitalized.
>
>
>
> Werner
>
>
>
> **************************************
> See what's free at http://www.aol.com.
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