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Pearlite is a two-phased, lamellar (or layered) structure composed of alternating layers of ferrite (87.5 wt%) and cementite (12.5 wt%) that occurs in some steels and cast irons. During slow cooling of an iron-carbon alloy, pearlite forms by a eutectoid reaction as austenite cools below 723 °C (1,333 °F) (the eutectoid temperature). Pearlite ...
Austenite is slightly undercooled when quenched below Eutectoid temperature. When given more time, stable microconstituents can form: ferrite and cementite. Coarse pearlite is produced when atoms diffuse rapidly after phases that form pearlite nucleate. This transformation is complete at the pearlite finish time (P f).
Austenite, also known as gamma-phase iron (γ-Fe), is a metallic, non-magnetic allotrope of iron or a solid solution of iron with an alloying element. [1] In plain-carbon steel , austenite exists above the critical eutectoid temperature of 1000 K (727 °C); other alloys of steel have different eutectoid temperatures.
Because perlite is improves soil draining, plants that prefer damp environments (ferns, mosses, certain tropical plants) should not be potted or planted using perlite in the soil mix, says Mcclure ...
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Perlite is an excellent filtration aid and is used extensively as an alternative to diatomaceous earth. The popularity of perlite usage as a filter medium is growing considerably worldwide. [citation needed] Several products exist in the market to provide perlite based filtration. Several perlite filters and perlite media have met NSF-50 ...
Seeds can be started in moistened standalone perlite or a 50-50 combination of perlite and soil, which keeps the sprouts from drying out. Perlite vs. Vermiculite Perlite and vermiculite both ...
During growth, Monascus spp. breaks down starch substrate into several metabolites, including pigments produced as secondary metabolites.The structure of pigments depends on the type of substrate and other specific factors during culture, such as acidity or basicity (), temperature, and moisture content.
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