(mineralogy) Alternative form of perlite. [(mineralogy) An amorphous volcanic glass formed by the hydration of obsidian.]
Used in a Sentence
pearlite
Definitions, parts of speech, synonyms, and sentence examples for pearlite.
Editorial note
Martensite forms by rapidly cooling austenite without giving the atoms the ability to re-organize into their preferred structure (ferrite, pearlite, or cementite depending on the carbon concentration).
Examples10
Definitions2
Parts of speech1
Quick take
(mineralogy) Alternative form of perlite. [(mineralogy) An amorphous volcanic glass formed by the hydration of obsidian.]
Meaning at a glance
The clearest senses and uses of pearlite gathered in one view.
A two-phased lamellar structure composed of alternating layers of alpha ferrite and cementite that occurs in some steels and cast irons, having a pearlescent appearance.
Definitions
Core meanings and parts of speech for pearlite.
noun
(mineralogy) Alternative form of perlite. [(mineralogy) An amorphous volcanic glass formed by the hydration of obsidian.]
noun
A two-phased lamellar structure composed of alternating layers of alpha ferrite and cementite that occurs in some steels and cast irons, having a pearlescent appearance.
Example sentences
Martensite forms by rapidly cooling austenite without giving the atoms the ability to re-organize into their preferred structure (ferrite, pearlite, or cementite depending on the carbon concentration).
Other hardening mechanisms (work/deformation hardening, pearlite formation, precipitation hardening) aren’t really amenable to additive processes - what’s the point of 3D printing if you have to deform your part to get the strength or hardness you need?
Ferrite and cementite can form nanolaminated microstructures called pearlite and bainite which have a major influence on the properties of the steel, and there are other microstructures that form depending on cooling speed, heat treatment, and cold working.
So as the solution of the three metals cool if done correctly the neodymium will come out of solution to form a mesh of neodymium around the grains of cerium and lanthanum in a similar way that pearlite forms from austinite and ferrite in steel.
These cooling rates are only able to be achieved a little ways into the bulk of the material, so you usually end up with a hardened case made of martensite, and a softer more ductile core that is usually pearlite (layers of ferrite [pure iron] and cementite [iron carbide]) that form due to the slower cooling in the core.
> This does not mean there was an intact carbon nanotube in the core of the cementite rod - and even if it DID mean that, it would have negligible impact on performance because it is *encased* in cementite, which itself is in a soft matrix of pearlite or sorbite.
This one is hardened to RC-57 (soft for the genre), ground from a hot-forged steel with 1.03%, carbon, 13.06% chromium, 0.37% nickel, and 0.28% nicklel, heated to 1000 degrees to promote austenization, and then oil quenched to form a highly martensitic steel, with moderate levels of pearlite and low levels of cementite.
Proper noun examples
Here's a list of some of the various grains in steel: Pearlite, Cementite, Bainite, Austenite (there are many more).
Pearlite, which you mention, consists of two phases, cementite and ferrite.
Pearlite in steel is the classic example.
Frequently asked questions
Short answers drawn from the clearest meanings and examples for this word.
How do you use pearlite in a sentence?
Martensite forms by rapidly cooling austenite without giving the atoms the ability to re-organize into their preferred structure (ferrite, pearlite, or cementite depending on the carbon concentration).
What does pearlite mean?
(mineralogy) Alternative form of perlite. [(mineralogy) An amorphous volcanic glass formed by the hydration of obsidian.]
What part of speech is pearlite?
pearlite is commonly used as noun.