cementation
Noun
Meaning
The act or process of cementing.
A process which consists in surrounding a solid body with the powder of other substances, and heating the whole to a degree not sufficient to cause fusion, the physical properties of the body being changed by chemical combination with powder; thus iron becomes steel by cementation with charcoal, and green glass becomes porcelain by cementation with sand.
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Additionally, the cemented consistency depends on cementation by substances other than clay, such as calcium carbonate, silica, oxides and salts; moisture content has little effect on its assessment.
Craddock and Eckstein 2003, pp. 224–5 Islamic cementation seems to have used zinc oxide known as tutiya or tutty rather than zinc ores for brass-making, resulting in a metal with lower iron impurities.
However the cementation process was not abandoned and as late as the early 19th century there are descriptions of solid-state cementation in a domed furnace at around 900–950 °C and lasting up to 10 hours.
Saint Anselm College New methods of producing it by carburizing bars of iron in the cementation process were devised in the 17th century.
The compositions of these early "brass" objects are highly variable and most have zinc contents of between 5% and 15% wt which is lower than in brass produced by cementation.
The Cementation group of companies delivers underground mine development and infrastructure as well as surface material handling and processing facilities solutions for mining projects worldwide.