Fusible alloy
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A '''fusible alloy''', usually [[eutectic]] [[alloy]] is capable of being [[heat of fusion|fused]], as well as being liquefied by heat.
Sometimes the term "fusible alloy" is used to describe alloys with a melting point below 150 °C. Fusible alloys in this sense are used for [[solder]].
Melted fusible alloys can be used as [[coolant]]s as they are stable under heating and can give much higher thermal conductivity than most other coolants; particularly with alloys made with a high thermal conductivity metal such as [[indium]] or [[sodium]]. Metals with low neutron cross-section are used for cooling nuclear reactors.
Fusible alloys are usually alloys of the relatively low melting point metals such as [[gallium]], [[indium]], [[bismuth]], [[tin]], [[lead]], and [[cadmium]]. [[Sodium]] and [[potassium]] are also used but must be kept well away from air and water.
Some reasonably well-known fusible alloys are [[Wood's metal]], [[Field's metal]], [[Rose metal]], [[Galinstan]], [[NaK]].
==Fusible alloy melting points==
{|class="wikitable"
!align=center|Composition
!align=center|°C
!align=center|Name
|-
|Cs 77.0, K 23.0||−48||
|-
|Hg 100||−39||
|-
|Ga 68.5, In 21.5, Sn 10||−19|| [[Galinstan]]
|-
|K 78.0, Na 22.0||−11|| [[NaK]]
|-
|Ga 62.5, In 21.5, Sn 16.0||10.7||
|-
|Ga 69.8, In 17.6, Sn 12.5||10.8||
|-
|Ga 100||30||
|-
|Bi 40.63, Pb 22.1, In 18.1, Sn 10.65, Cd 8.2||46.5||
|-
|Bi 32.5, In 51.0, Sn 16.5||60.5|| [[Field's metal]]
|-
|Bi 50.0, Pb 25.0, Sn 12.5, Cd 12.5||70|| [[Wood's metal]]
|-
|Bi 50.0, Pb 31.2, Sn 18.8||97|| [[Newton's metal]]
|-
|Bi 50.0, Pb 28.0, Sn 22.0||109|| [[Rose's metal]]
|-
|Sn 63.0, Pb 37.0||183|| Eutectic [[solder]]
|-
|Sn 92.0, Zn 8.0||199|| [[Tin foil]]
|}
==References==
*Weast, R.C., "CRC Handbook of Chemistry and Physics", 55th ed, CRC Press, Cleveland, 1974, p. F-22
==External links==
*[http://www.harpellassociates.com/a/a-fusible.htm Fusible (Low Temp) Alloys]
*Making your own low-melting point eutectic: ''[http://scitoys.com/scitoys/scitoys/thermo/thermo4.html Science Toys: A metal that melts in hot water]''
[[Category:Fusible alloys| ]]
[[Category:Coolants]]
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