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Baker I, Schulson EM, Michael JR, Pennycook SJ. The effects of both deviation from stoichiometry and boron on grain boundaries in Ni3Al. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/13642819008215261] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- I. Baker
- a Thayer School of Engineering, Dartmouth College , Hanover , New Hampshire , 03755 , U.S.A
| | - E. M. Schulson
- a Thayer School of Engineering, Dartmouth College , Hanover , New Hampshire , 03755 , U.S.A
| | - J. R. Michael
- b Bethlehem Steel Corporation, Homer Research Laboratories , Bethlehem , Pennsylvania , 1816 , U.S.A
| | - S. J. Pennycook
- c Solid State Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee , 03781 , U.S.A
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Abstract
Grain boundary (GB) segregation has been measured in Ca-doped MgO by examining intergranular fracture surfaces with Auger electron spectroscopy. The measurements reveal several interesting features. The composition of any given GB on the fracture surface is almost uniform, except for small variations due to deviations from planarity. There is a strong anisotropy of GB composition, which can amount to as much as a factor of six between low and high segregation GB's. Finally, although the compositions of opposite sides of a GB fracture are uniform, there are sometimes significant differences between the two sides, in agreement with a recently formulated model of GB composition as a function of GB character.
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Choudhury A, White C, Brooks C. The intergranular segregation of boron in Ni3Al: Equilibrium segregation and segregation kinetics. ACTA ACUST UNITED AC 1992. [DOI: 10.1016/0956-7151(92)90199-o] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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