### Abstract

The high resolution TEM observation of 〈110〉 symmetric tilt grain boundaries in titanium carbide has shown that at a boundary near to the incoherent (112̄) Σ3 coincidence boundary there exists a periodic grain boundary structure consisting of two kinds of atomic arrangements. One is a mirror-symmetric atomic arrangement in the adjacent crystals to the boundary, and the other is a periodically mixed structure of mirror-symmetric and asymmetric arrangements. Two kinds of asymmetric structures are observed depending on a slight deviation from the ideal misorientation. This fact is explained by the DSC dislocation (b = a/6[112̄]) and lattice dislocation (b = a/2[011̄]) extended on their boundaries after dissociating into two partial dislocations, respectively. Further, the observed periodic structures of the boundary can well be explained by the DSC dislocations based on the CSL model and boundary dislocations predicted by the O-lattice model.

Original language | English |
---|---|

Pages (from-to) | 881-888 |

Number of pages | 8 |

Journal | Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals |

Volume | 59 |

Issue number | 9 |

DOIs | |

Publication status | Published - Jan 1 1995 |

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### All Science Journal Classification (ASJC) codes

- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys
- Materials Chemistry

### Cite this

*Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals*,

*59*(9), 881-888. https://doi.org/10.2320/jinstmet1952.59.9_881

**Structures of (112̄) Σ3 coincidence boundaries in titanium carbide.** / Morita, Koji; Tsurekawa, Sadahiro; Nakashima, Hideharu; Yoshinaga, Hideo.

Research output: Contribution to journal › Article

*Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals*, vol. 59, no. 9, pp. 881-888. https://doi.org/10.2320/jinstmet1952.59.9_881

}

TY - JOUR

T1 - Structures of (112̄) Σ3 coincidence boundaries in titanium carbide

AU - Morita, Koji

AU - Tsurekawa, Sadahiro

AU - Nakashima, Hideharu

AU - Yoshinaga, Hideo

PY - 1995/1/1

Y1 - 1995/1/1

N2 - The high resolution TEM observation of 〈110〉 symmetric tilt grain boundaries in titanium carbide has shown that at a boundary near to the incoherent (112̄) Σ3 coincidence boundary there exists a periodic grain boundary structure consisting of two kinds of atomic arrangements. One is a mirror-symmetric atomic arrangement in the adjacent crystals to the boundary, and the other is a periodically mixed structure of mirror-symmetric and asymmetric arrangements. Two kinds of asymmetric structures are observed depending on a slight deviation from the ideal misorientation. This fact is explained by the DSC dislocation (b = a/6[112̄]) and lattice dislocation (b = a/2[011̄]) extended on their boundaries after dissociating into two partial dislocations, respectively. Further, the observed periodic structures of the boundary can well be explained by the DSC dislocations based on the CSL model and boundary dislocations predicted by the O-lattice model.

AB - The high resolution TEM observation of 〈110〉 symmetric tilt grain boundaries in titanium carbide has shown that at a boundary near to the incoherent (112̄) Σ3 coincidence boundary there exists a periodic grain boundary structure consisting of two kinds of atomic arrangements. One is a mirror-symmetric atomic arrangement in the adjacent crystals to the boundary, and the other is a periodically mixed structure of mirror-symmetric and asymmetric arrangements. Two kinds of asymmetric structures are observed depending on a slight deviation from the ideal misorientation. This fact is explained by the DSC dislocation (b = a/6[112̄]) and lattice dislocation (b = a/2[011̄]) extended on their boundaries after dissociating into two partial dislocations, respectively. Further, the observed periodic structures of the boundary can well be explained by the DSC dislocations based on the CSL model and boundary dislocations predicted by the O-lattice model.

UR - http://www.scopus.com/inward/record.url?scp=0029368323&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029368323&partnerID=8YFLogxK

U2 - 10.2320/jinstmet1952.59.9_881

DO - 10.2320/jinstmet1952.59.9_881

M3 - Article

AN - SCOPUS:0029368323

VL - 59

SP - 881

EP - 888

JO - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals

JF - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals

SN - 0021-4876

IS - 9

ER -