39486 Ceramic materials characterization using small angle neutron scattering techniques Materials Characterization fro Systems Performance and Reliability. Proceedings of the 31st Sagamore Army Materials Research Conference, Lake Luzerne, New York (United States), 13–17 Aug. 1984. pp. 257–269. Plenum Press, 616 pp. (1986)

1989 ◽  
Vol 22 (4) ◽  
pp. 241
Author(s):  
K Hardman-Rhyne
Keyword(s):  
United States ◽  
New York ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Ceramic Materials ◽  
Materials Characterization ◽  
Research Conference ◽  
Materials Research

scholarly journals Sintering characteristics of nanocrystalline TiO2—A study combining small angle neutron scattering and nitrogen absorption–BET

1991 ◽  
Vol 6 (10) ◽  
pp. 2193-2198 ◽  
Author(s):  
W. Wagner ◽  
R.S. Averback ◽  
H. Hahn ◽  
W. Petry ◽  
A. Wiedenmann
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Pore Volume ◽  
Small Angle Neutron Scattering ◽  
Ceramic Materials ◽  
Sample Volume ◽  
Nitrogen Absorption ◽  
Nanocrystalline Tio2 ◽  
Different Temperatures ◽  
Sintering Characteristics

Small angle neutron scattering (SANS) was employed to characterize the pore structure of nanophase TiO2 ceramic materials compacted at different temperatures. Nanophase samples, produced by inert gas condensation, were compacted at 25, 290, 413, and 550 °C using a pressure of ≍1 GPa. The pore size distribution of the sample compacted at room temperature was very broad, with sizes ranging from ≍3–30 nm and pores comprising 38% of the sample volume. Compaction at 290 and 413 °C reduced the pore volume to 25% and 20%, respectively, by eliminating pores at both the small and large ends of the distribution. Compaction at 550 °C resulted in a pore volume that was less than 8%. Complications in the SANS analysis arising from the scattering from grain boundaries are discussed. The results from SANS are compared with those derived from nitrogen absorption, BET, measurements.

A New Application of Small Angle Neutron Scattering in Materials Research

1987 ◽  
Vol 78 (8) ◽  
pp. 603-606
Author(s):  
Werner Wagner ◽  
Mona MacLaren Ferguson ◽  
Heinrich Wollenberger ◽  
Winfried Petry
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Materials Research

Small-Angle Neutron Scattering in a High-Temperature Furnace

1994 ◽  
Vol 376 ◽  
Author(s):  
G.G. Long ◽  
H.M. Kerch ◽  
S. Krueger ◽  
A.J. Allen ◽  
H. Burdette
Keyword(s):  
High Temperature ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Process Models ◽  
Pore Sizes ◽  
Surface Areas ◽  
High Temperature Furnace ◽  
Materials Research

ABSTRACTSmall-angle neutron scattering (SANS) is increasingly used to obtain statistically-representative data on particle or pore sizes, number and volume fractions, morphology and total surface areas in technological materials. Until recently, however, it had not been possible to perform in-situ microstructural investigations during thermal treatment. This paper reports on a new high-temperature (up to 1700°C) SANS furnace for materials research. Two interchangeable inner furnaces were built for a single outer atmosphere chamber so that either an oxidizing, a reducing, or a neutral environment can be used. Results derived during sintering of a controlled-porosity silica gel will be presented. The new furnace has made it possible for the first time to measure total porous surface areas and the evolution of pore sizes in situ during densification without interruption. Such measurements are expected to lead to improved process models offering quantitative predictability of product microstructures from the processing history of real materials.

Application of Sans to Ceramic Characterization

1986 ◽  
Vol 73 ◽  
Author(s):  
K. G. Frase ◽  
K. A. Hardman-Rhyne ◽  
N. F. Berk
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Ceramic Materials ◽  
Pore Size Distributions ◽  
Mdf Cements ◽  
Characterization Of Materials ◽  
Non Destructive

ABSTRACTTraditionally, small angle neutron scattering (SANS) has been used to study dilute concentrations of defects 1 -100 nm in size. Recent extensions of the scattering theory have allowed the expansion of the technique to include larger sizes through the use of multiple scattering. With multiple small angle neutron scattering, defects (pores, microcracks, precipitates) up to 10 μm in size can be studied. SANS is inherently a non-destructive, bulk probe of microstructure, with wide applications in the characterization of materials.A number of studies of ceramic materials using multiple and traditional (single particle diffraction) small angle neutron scattering will be discussed. The emphasis will be on the strength of the technique in the characterization of materials. Particular examples will include: the assessment of pore size distributions in spinel compacts as a function of sintering and agglomeration, the characterization of primary and secondary particle sizes in precipitated aggregates, and the determination of microporosity in MDF cements.

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