Synthesis and Characterization of Aluminum-Carbon Nanotube Composite by Cryogenic Milling

reportActive / Technical Report | Accession Number: ADA561823 | Open PDF

Abstract:

Cryogenic milling was studied for the ex situ strengthening of aluminum Al with carbon nanotubes CNT. Characterization of mechanically alloyed Al-CNT powders was conducted in preparation for bulk powder processing to be used in cold spray. Al-CNT metal matrix composite powders with 5 wt. and 10 wt. CNT were synthesized by cryogenic milling of the blended component powders. Stearic acid was used as a process control agent to minimize agglomeration of the powders upon milling. CNT reinforcement of the Al powder was successfully obtained while maintain CNT structure after milling the powders for periods ranging between six and 90 minutes using a SPEX 6870 FreezerMill. Composition and properties of the Al-CNT composite was studied using X-ray diffraction, optical microscopy, nanoindentation, scanning electron microscopy SEM, Raman spectroscopy, and laser diffraction particle size analysis.

Author(s):
Bottolfson, Brent A.
Author Organization(s):
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
Descriptive Note:
Master's thesis
Pagination:
0075

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Monitor Series:
NPS
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning; JCA_1.2.7_Experimentation; JCA_4.3_Maintain; JCA_4.6_Engineering
Communities of Interest:
Advanced Electronics
Descriptor(s):
*ALUMINUM, *CARBON NANOTUBES, *CRYOGENICS, AGGLOMERATES, CHEMICAL MILLING, CONTROL, CUTTING, ELECTRON MICROSCOPY, MICROSCOPY, OPTICAL ANALYSIS, POWDERS, PREPARATION, PROCESSING, RAMAN SPECTROSCOPY, SCANNING ELECTRON MICROSCOPES, SPRAYS, STEARIC ACID, SYNTHESIS, THESES, X RAY DIFFRACTION
Field(s)/Group(s):
Properties of Metals and Alloys, Thermodynamics
Keyword(s):
CRYOGENIC MILLING, MECHANICAL ALLOYING
Report Date:
2012 Mar 01
Creation Date:
2012 Jul 30