ASTM B243-05a
(Terminology)Standard Terminology of Powder Metallurgy
Standard Terminology of Powder Metallurgy
SCOPE
1.1 This terminology includes definitions of terms that are useful to the powder metallurgy industry. These definitions are helpful in the interpretation and application of powder metallurgy terms.
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Designation:B243–05a
Standard Terminology of
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Powder Metallurgy
This standard is issued under the fixed designation B243; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
Note—Edit changes were made throughout and the year date changed on March 31, 2005.
1. Scope 2.6 Forging, 3.2.8
2.7 Metal Injection Molding, 3.2.9
1.1 This terminology standard includes definitions that are
helpful in the interpretation and application of powder metal-
3. Sintering:
lurgy terms.
3.1 Process for Sintering, 3.3.1
2. Referenced Documents 3.2 Conditions During Sintering, 3.3.2
3.3 Phenomena Resulting from Sintering, 3.3.3
2.1 ASTM Standards:
3.4 Properties of Sintered Parts, 3.3.4
B331 TestMethodforCompressibilityofMetalPowdersin
2
3.5 Procedure to Evaluate Sintered Parts, 3.3.5
Uniaxial Compaction
3.6 Removal of Binders, 3.3.6
3. Terminology
4. Postsinter Treatments:
3.1 Powder—Terms associated with production, character-
4.1 Processes, 3.4.1
ization, use, and testing of metal powders.
5. Miscellaneous:
3.1.1 Table of Contents
5.1 Definitions, 3.5.1
1. Powders:
5.2 Processes, 3.5.2
1.0 General, 3.1.2
5.3 Materials, 3.5.3
1.1 Processes to Produce Powder, 3.1.3
1.2 Types of Powder, 3.1.4
3.1.2 General:
1.3 Shapes of Powder Particles, 3.1.5
1001 agglomerate, n—several particles adhering together.
1.4 Additives to Powder, 3.1.6
1002 particulate matter, n—see powder.
1.5 Treatment of Powder, 3.1.7
1003 P/M, n—the acronym representing powder metallurgy.
1.6 Properties of Powder, 3.1.8
Used as P/M Part, P/M Product, P/M Process, and so forth.
1.7 Procedures to Evaluate Powder, 3.1.9
1004 powder metallurgy, n—the production and utilization
1.8 Equipment to Evaluate Powder, 3.1.10
of metal powders.
1005 powder, n—particlesthatareusuallylessthan1000µm
2. Forming:
(1 mm) in size.
2.0 General, 3.2.1
1006 metal powder, n—particles of elemental metals or
2.1 Processes for Compacting, 3.2.2
alloys, normally less than 1000 µm (1 mm) in size.
2.2 Conditions of Compacting, 3.2.3
2.3 Tools Used for Compacting, 3.2.4
3.1.3 Processes to Produce Powder:
2.4 Phenomena Resulting from Compaction, 3.2.5
1101 atomization, n—the dispersion of a molten metal into
2.5 Properties of Compacts, 3.2.7
particles by a rapidly moving gas or liquid stream or by
mechanical means.
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This terminology is under the jurisdiction ofASTM Committee B09 on Metal
1102 granulation, n—the production of coarse metal par-
Powders and Metal Powder Products and is the direct responsibility of Subcom-
ticles by pouring the molten metal through a screen into water
mittee B09.01 on Nomenclature and Technical Data.
(shotting) or by violent agitation of the molten metal while
Current edition approved March 31, 2005. Published April 2005. Originally
approved in 1949. Last previous edition approved in 2005 as B243–05. solidifying.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1103 classification, n—separation of a powder into fractions
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
according to particle size.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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B243–05a
1104 air classification, n—the separation of powder into 1211 matrix metal, n—the continuous phase of a polyphase
particle size fractions by means of an air stream of controlled alloy or mechanical mixture; the physically continuous metal-
lic constituent in which separate particles of another constitu-
velocity.
ent are embedded.
1105 gas classification, n—the separation of powder into
1212 composite powder, n—a powder in which each particle
particle size fractions by means of a gas stream of controlled
consists of two or more distinct constituents.
velocity.
1213 spongy, n—a porous condition in metal powder par-
1106 chemical deposition, n—the precipitation of one metal
ticles usually observed in reduced oxides.
from a solution of its salts by the addition of another metal or
1214 sponge iron, n—a coherent, porous mass of substan-
reagent to the solution.
tially pure iron produced by solid-state reduction of iron oxide
1107 chemically precipitated metal powder, n—powder pro-
(for example, iron ore or mill scale).
duced by the reduction of a metal from a solution of its salts
1215 sponge iron powder, n—ground and sized sponge iron,
either by the addition of another metal higher in the electro-
which may have been purified or annealed or both.
motive
...
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