cementite
Noun
Meaning
a chemical compound that is a constituent of steel and cast iron; very hard and brittle
Source: WordNetSynonyms
Hypernyms
Phrases with the word
Examples
After cementite is formed, the integrity of the disc is compromised.
Examples include calcium carbide (CaC 2 ), silicon carbide (SiC), tungsten carbide (WC) (often called simply carbide when referring to machine tooling), and cementite (Fe 3 C), citation each used in key industrial applications.
Cooling a mixture of iron with 0.8% carbon slowly below 723 °C to room temperature results in separate, alternating layers of cementite and ferrite, which is soft and malleable and is called pearlite for its appearance.
In a hypereutectoid composition (greater than 0.8% carbon), the carbon will first precipitate out as large inclusions of cementite at the austenite grain boundaries and then when the composition left behind is eutectoid, the pearlite structure forms.
No large inclusions of cementite will form at the boundaries.
When carbon moves out of solution with iron it forms a very hard, but brittle material called cementite (Fe 3 C).