ASTM B243-01

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Designation: B 243 – 01
Standard Terminology of
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Powder Metallurgy
This standard is issued under the fixed designation B 243; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.5 Procedure to Evaluate Sintered Parts, 3.3.5
3.6 Removal of Binders, 3.3.6
1.1 This terminology includes definitions of terms that are
4. Postsinter Treatments:
specific to the powder metallurgy industry. These definitions
4.1 Processes, 3.4.1
are helpful in the interpretation and application of powder
5. Miscellaneous:
metallurgy terms.
5.1 Definitions, 3.5.1
2. Referenced Documents
5.2 Processes, 3.5.2
5.3 Materials, 3.5.3
2.1 ASTM Standards:
3.1.2 General:
B 331 Test Method for Compressibility of Metal Powders in
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1001 agglomerate, n—several particles adhering together.
Uniaxial Compaction
1002 particulate matter, n—see powder.
3. Terminology
1003 P/M, n—the acronym representing powder metallurgy.
Used as P/M Part, P/M Product, P/M Process, and so forth.
3.1 Powder—Terms associated with production, character-
1004 powder metallurgy, n—the production and utilization
ization, use, and testing of metal powders.
of metal powders.
3.1.1 Table of Contents
1005 powder, n—particles that are usually less than 1000
1. Powders:
μm (1 mm) in size.
1.0 General, 3.1.2
1006 metal powder, n—particles of elemental metals or
1.1 Processes to Produce Powder, 3.1.3
alloys, normally less than 1000 μm (1 mm) in size.
1.2 Types of Powder, 3.1.4
3.1.3 Processes to Produce Powder:
1.3 Shapes of Powder Particles, 3.1.5
1101 atomization, n—the dispersion of a molten metal into
1.4 Additives to Powder, 3.1.6
particles by a rapidly moving gas or liquid stream or by
1.5 Treatment of Powder, 3.1.7
mechanical means.
1.6 Properties of Powder, 3.1.8
1102 granulation, n—the production of coarse metal par-
1.7 Procedures to Evaluate Powder, 3.1.9
ticles by pouring the molten metal through a screen into water
1.8 Equipment to Evaluate Powder, 3.1.10
(shotting) or by violent agitation of the molten metal while
2. Forming:
solidifying.
2.0 General, 3.2.1
1103 classification, n—separation of a powder into fractions
2.1 Processes for Compacting, 3.2.2
according to particle size.
2.2 Conditions of Compacting, 3.2.3
1104 air classification, n—the separation of powder into
2.3 Tools Used for Compacting, 3.2.4
particle size fractions by means of an air stream of controlled
2.4 Phenomena Resulting from Compaction, 3.2.5
velocity.
2.5 Properties of Compacts, 3.2.6
1105 gas classification, n—the separation of powder into
2.6 Forging, 3.2.7
particle size fractions by means of a gas stream of controlled
2.7 Metal Injection Molding, 3.2.8
velocity.
3. Sintering:
1106 chemical deposition, n—the precipitation of one metal
3.1 Process for Sintering, 3.3.1
from a solution of its salts by the addition of another metal or
3.2 Conditions During Sintering, 3.3.2
reagent to the solution.
3.3 Phenomena Resulting from Sintering, 3.3.3
1107 chemically precipitated metal powder, n—powder
3.4 Properties of Sintered Parts, 3.3.4
produced by the reduction of a metal from a solution of its salts
either by the addition of another metal higher in the electro-
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This terminology is under the jurisdiction of ASTM Committee B09 on Metal
motive series or by other reducing agent.
Powders and Metal Powder Products and is the direct responsibility of Subcommit-
tee B09.01 on Nomenclature and Technical Data. 1108 reduced metal powder, n—metal powder produced,
Current edition approved April 10, 2001. Published August 2001. Originally
without melting, by the chemical reduction of metal oxides or
published as B 243 – 49 T. Last previous edition B 243 –00a.
other compounds.
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Annual Book of ASTM Standards, Vol 02.05.
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B 243
1109 disintegration, n—the reduction of massive material 3.1.5 Shapes of Powder Particles:
to powder.
1301 acicular powder, n—needle-shaped particles.
1110 milling, n—the mechanical treatment of metal powder,
1302 needles, n—elongated rod-like particles.
or metal powder mixtures, as in a ball mill, to alter the size or 1303 granular powder, n—particles having approximately
shape of the individual particles or to coat one component of
equidimensional nonspherical shapes.
the mixture with another.
1304 nodular powder, n—irregular particles having knot-
1111 pulverization, n—the reduction in particle size of ted, rounded, or similar shapes.
metal powder by mechanical means, a specific type of disin-
1305 irregular powder, n—particle
...