NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Bend strengths of reaction bonded silicon nitride prepared from dry attrition milled silicon powderDry attrition milled silicon powder was compacted, sintered in helium, and reaction bonded in nitrogen-4 volume percent hydrogen. Bend strengths of bars with as-nitrided surfaces averaged as high as 210 MPa at room temperature and 220 MPa at 1400 C. Bars prepared from the milled powder were stronger than those prepared from as-received powder at both room temperature and at 1400 C. Room temperature strength decreased with increased milling time and 1400 C strength increased with increased milling time.
Document ID
19790022208
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Herbell, T. P.
(NASA Lewis Research Center Cleveland, OH, United States)
Glasgow, T. K.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
January 1, 1979
Subject Category
Nonmetallic Materials
Report/Patent Number
DOE/NASA/1040-79/8
E-132
NASA-TM-79230
Meeting Information
Meeting: Ann. Conf. on Composites and Advan. Mater.
Location: Merritt Island, FL
Country: United States
Start Date: January 21, 1979
End Date: January 24, 1979
Sponsors: Am. Ceram. Soc.
Accession Number
79N30379
Funding Number(s)
CONTRACT_GRANT: EC-77-A-31-1040
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
No Preview Available