Nisil
Encyclopedia
Nisil is an alloy
of nickel
and silicon
. Typically, the alloy is mostly nickel alloyed with 4.4% silicon.
Nisil melts at 1341 °C
and has a density
of 8.55 g/cm³.
It is often used in conjunction with Nicrosil
in type N thermocouple
s. In this use, it serves as the negative leg of the thermocouple.
Alloy
An alloy is a mixture or metallic solid solution composed of two or more elements. Complete solid solution alloys give single solid phase microstructure, while partial solutions give two or more phases that may or may not be homogeneous in distribution, depending on thermal history...
of nickel
Nickel
Nickel is a chemical element with the chemical symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel belongs to the transition metals and is hard and ductile...
and silicon
Silicon
Silicon is a chemical element with the symbol Si and atomic number 14. A tetravalent metalloid, it is less reactive than its chemical analog carbon, the nonmetal directly above it in the periodic table, but more reactive than germanium, the metalloid directly below it in the table...
. Typically, the alloy is mostly nickel alloyed with 4.4% silicon.
Nisil melts at 1341 °C
Celsius
Celsius is a scale and unit of measurement for temperature. It is named after the Swedish astronomer Anders Celsius , who developed a similar temperature scale two years before his death...
and has a density
Density
The mass density or density of a material is defined as its mass per unit volume. The symbol most often used for density is ρ . In some cases , density is also defined as its weight per unit volume; although, this quantity is more properly called specific weight...
of 8.55 g/cm³.
It is often used in conjunction with Nicrosil
Nicrosil
Nicrosil is a nickel alloy containing 14.4% chromium, 1.4% silicon, and 0.1% magnesium.Nicrosil is used as the positive leg of type N thermocouples. In this application another nickel alloy, Nisil, is used as the negative leg.-External links:*...
in type N thermocouple
Thermocouple
A thermocouple is a device consisting of two different conductors that produce a voltage proportional to a temperature difference between either end of the pair of conductors. Thermocouples are a widely used type of temperature sensor for measurement and control and can also be used to convert a...
s. In this use, it serves as the negative leg of the thermocouple.