In other words, the geometric density is less. Each particle of a solid material has the same true density after grinding, milling or processing, but more geometric space is occupied by the material. Tap Density: The density of a powder when the volume receptacle is tapped or vibrated under specified conditions while being loaded. Packed Density: Please see preferred term of tap density Green Density: The density of a green compact Also referred to as a percent theoretical densityĭry Density: The mass per unit volume of an unimpregnated sintered part

This is called geometric, envelope or bulk density and only equals true density when there are no internal openings in the material being measured.ġ) The ratio of the mass of a volume of solid material to the same volume of water.Ģ) The mass per unit volume of a solid material expressed in grams per cubic centimeter.Īpparent Density: The weight of a unit volume of powder, usually expressed as grams per cubic centimeter, determined by a specific methodīulk Density: Powder in a container or bin expressed in mass unit per volumeĭensity Ratio: The ratio of the determined density of a compact to the absolute density of metal of the same composition, usually expressed as a percentage.

including any interior voids, cracks or pores. German, Powder Metallurgy Science, Second Editionĭensity: One of the most common density measurements involves the determination of the geometric space occupied within the envelope of a solid material. 1g/cm3=0.0361 lb/in3(pound per cubic inch)Ĭourtesy Of: Dr.

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