Instrument Information
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| IDENTIFIER |
urn:nasa:pds:context:instrument:em3.ptf_100_friability_tester::1.2
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| NAME |
PTF 100 Friability Tester
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| TYPE |
Mechanical Properties Instrument
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| DESCRIPTION |
The PTF-100 Friability Tester is a precision mechanical tumbler designed to quantify the abrasion and fragmentation resistance of particulate or granular materials under controlled impact conditions. The instrument consists of a transparent rotating drum with an internal baffle that lifts and drops the sample continuously during rotation, generating reproducible normal and shear stresses thatsimulate natural collisional disaggregation. For each test, a known mass of sample fragments is tumbled ata fixed rotation speed (25 ± 1 rpm) for prescribed revolution counts ranging from 10^2 to 10^5. The cumulative mass loss and particle-size redistribution are measured after each tumbling stage to compute friability. The system conforms to the U.S. Pharmacopeia (USP <1216>) standard for friability measurement but has been adapted for geological materials by using stainless-steel drums and extended revolution counts to capture both early-stage cracking and late-stage attrition processes relevant to meteorite fragmentation.
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| REFERENCES |
Bhatt, S., Davis, T.P., Cotto-Figueroa, E. Asphaug, Garvie, L.A.J., Hoover, C.G. 2024. Nano-Chemo-MechanicalBehavior of the Carbonaceous Chondrite Meteorite Tarda: Implications for Planetary Defense. In review.
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