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TEL: +81-(0)727-51-9641
FAX: +81-(0)727-51-9627
E-mail: ceramic@onri.go.jp
Lust Update: July 28.1998
As ceramic materials are excellent in high temperature strength, chemical durability and wear resistance, they are expected to be widely utilized in structural applications. In the field of functional ceramics, more prominent materials are strongly demanded from industries with the trend for higher efficiency, lighter weight and higher integration.
The characteristics of ceramics are controlled not only by their bulk properties but also by the properties at their grain boundaries or interfaces. We, at ceramic materials section of ONRI, pay attention to the grain boundaries and interfaces of ceramics and are promoting researches on; (1) Analysis and evaluation technologies for material interfaces; (2) Simulation and design technologies of interfaces; (3) Creation and manufacturing technologies for ceramic and ceramic composite materials with high performance and low cost.
Our current research works are as follows; Theoretical calculation of ceramic/ceramic or metal/ceramic interfaces on first principle; Observation and analysis of various interfaces with high resolution transmission electron microscopy; Development of fiber reinforced composite materials by precursor method; Sintering technologies with spark plasma sintering; Development and evaluation of ceramic bearings with nano-structured materials.
1. Research on design and creation of frontier ceramics (1995-1999)
2. Research and development of nano-structured materials for ceramic rolling bearings (1997-1999)
3. Research on tribological properties of ceramics (1997-1999)
4. Research on precise analysis technology for interface design at atomic and electronic level (1998-2000)
5. Basic research on mechanism controlling material properties (1998-2000)
@
(Section
head) / iwasa@onri.go.jp@
.Tribology of ceramics
.Ceramic bearing technologies
.Surface analysis with atomic force microscopy
(Senior
researcher) / tamari@onri.go.jp
.Manufacturing and evaluation of whisker composite ceramics
.Manufacturing of ceramics with spark plasma sintering
(Senior
researcher) / kondoh@onri.go.jp
.Sintering technologies of ceramics
.Evaluation technologies of ceramics
(Senior researcher) / kohyama@onri.go.jp
.Theoretical calculations of grain boundaries in ceramics and semiconductors and of metal/ceramic interfaces
.Theoretical calculations of extended defects in ceramics and semiconductors
.Theoretical design of interfaces
.Development of efficient algorithms and codings for first-principles moleculer dynamics and tight-binding moleculer dynamics
(Senior researcher) / tata@onri.go.jp
.Development of fiber reinforced composite materials with precursor method
(Senior
researcher) / koji@onri.go.jp
.Structure analysis of interface by high resolution electron microscopy
.Interelation between material properties and atomic and electronic structures
.Development of new technology for interface structure analysis
M.Kohyama and S.Takeda
"Tight-Binding Study of the {113} Planar Interstitial Defects in Si"
[Phys.Rev.B, vol.51, p.13111, 1995]
T.Hayashi, K.Tanaka and M.Haruta
"Selective Partial Oxidation of Hydrocarbons over Au/TiO2 Catalysts"
[Preprints Symp.Hetero.Hydrocabon Oxidation, 211th Nat.Meet., Amer.Chem.Soc., New Orleans, March, vol41, p.71-74, 1996]
T.Tanaka, N.Tamari, I.Kondoh and M.Iwasa
"Fabrication and Mechanical Properties of 3-Dimensional Tyranno Fiber Reinforced SiC Composites by Repeated Infiltration of Polycarbosilane"
[J.Ceram.Soc.Japan, vol.104, p.454-457, 1996]
M.Kohyama, H.Ichinose, Y.Isida and M.Nakanose
"Tight-Binding Caluculation of Grain Boundaries in Diamond"
[Materials Science Forum, 207/209, p.261-264, 1996]
M.Kohyama
"Theoretical Study of Grain Boundaries in Silicon: Features of Atomic and Electronic Structures"
[Materials Science Forum, 207/209, p.265-268, 1996]
W.Vogel, D.A.H.Cunninngham, K.Tanaka and M.Haruta
"Structural Analysis of Au/Mg(OH)Qduring Deactication by Debye Function Analysis"
[Catalysis Letters, vol.40, p.175-181, 1996]
M.Kohyama
"Ab Initio Calculations for SiC-Al Interfaces by Conjugate-Gradient Techniques"
[Materials Research Society Symposium Proceedings, vol.408, p.49, 1996]
M.Kohyama
"Ab Initio Calculations for SiC-Al Interfaces: Tests of Electronic-Minimization Techniques"
[Modelling Simul.Mater.Sci.Eng., vol.4, p.397, 1996]
K.Tanaka, T.Hayashi and M.Haruta
"Analytical Study of Structyre Sensitive Property of Au/TiO2 Catalyst
[Interf.Sic.Mater.Interconnection, Proc.JIMIS-8, Jpn.Inst.Metals, p.547-550, 1996]
M.Kohyama, H.Ichinose, Y.Ishida and M.Nakanose
"Atomic and Electronic Structures of Grain Boundaries in Diamond:Tight-Binding Calculations"
[Inteface Science and Materials Interconnection.Proc.of.JIMIS-8, JIM, p.367, 1997]
M.Kohyama
"Ab Initio Calculations for Interface:SiC-Al interfaces and Grain Boundaries in SiC"
[Inteface Science and Materials Interconnection. Proc.of.JIMIS-8, JIM, p.189, 1997]
M.Kohyama et al.
"Tight-Binding Calculations of the {211}=3 Boundary in Diamond"
[Interface Science, vol.4, p.157, 1997]
K.Tanaka, T.Hayashi and M.Haruta
"Anaiytical Study of Structure Sensitive Prooerty of Au/TiO2 Catalyst"
[Interface Science and Materials Interconnection, Proc.of JIMI-8, JIM, p.547, 1997]
T.Tanaka, N.Tamari, I.Kondoh and M.Iwasa
"Effect of the Surface Structure of Si-Ti-C-O Fiber on the Properties of Three-Dimensional Fiber-Reinforced Silicon Carbide Composites"
[J.Ceram.Soc.Japan, vol.105, in press, 1997]
N.Arai, S.Takeda and M.Kohyama
"Self-Interstitial Clustering in Crystalline Silicon"
[Phys.Rev.Lett., vol.78, p.4265, 1997]
M.Kohyama
"Ab Initio Calculations for Grain Boundaries in Covalent Ceramics"
[MRS Symp.Proc., vol.458, p.33, 1997]
T.Tanaka, N.Tamari, I.Kondoh and M.Iwasa
"Effect of the Surface Structure of Si-Ti-C-O Fiber on the Properties of 3-Dimensional Fiber-Reinforcd Silicon Carbide Composites"
[Ceramics Engineering & Science Proceedings, vol.18, p.303-310, 1997]
M.Kohyama
"Theoretical Studies of Grain Boundaries in Covalent Materials"
[Materials Chemistry and Phsics, vol.50, p.159, 1997]
T.Tanaka, N.Tamari, I.Kondoh and M.Iwasa
"Effect of the Surface Structure of Si-Ti-C-O Fiber on the Properties of Three-Dimensional Fiber-Reinforcd Silicon Carbide Composites"
[Proc.of the 14 th International Japan-Korea Seminer on Ceramics, p.204-208, 1997]
T.Tanaka, N.Tamari, I.Kondoh and M.Iwasa
"Effect of the Surface Structure of Si-Ti-C-O Fiber on the Properties of Three-Dimensional Fiber-Reinforcd Silicon Carbide Composites"
[J.Ceram.Soc.Japan, vol.105, p.1146-1150, 1997]
M.Iwasa
"Improvement of Abrasive Wear Resistance by Whisker Reinforcement in Alumina Ceramics"
[MRS Symp.Proc, vol.458, p.215-220, 1997]
J.Hoekstra and M.Kohyama
"Ab Initio Calculations of -SiC(001)/Al Interface"
[Phys.Rev.B, vol.57, p.2334, 1998]
 Please contact at ceramic@onri.go.jp |