FINAL PROGRAM

HIGH TEMPERATURE STRUCTURAL SILICIDES CONFERENCE

May 25 - 29, 1998
Sheraton Hyannis Resort
West End Circle
Hyannis, Massachusetts 02601

CO-CHAIRS:
J.J. Petrovic, Los Alamos National Laboratory
A.K. Vasudevan, Office of Naval Research
S.G. Fishman, Office of Naval Research
C.A. Sorrell, U.S. Department of Energy
M.V. Nathal, NASA-Lewis Research Center

Engineering Foundation Conferences
345 East 47th Street, Suite 303
New York, NY 10017
T: 1-212-705-7836; F: 1-212-705-7441
E: engfnd@aol.com; WWW: http://www.engfnd.org

IMPORTANT NOTICE:

The Proceedings for this Conference will be published in the refereed journal - Materials Science & Engineering.

Authors must bring four copies of their written manuscript to the Conference.
The manuscript format is that of Materials Science & Engineering.

Invited Paper Limit: 15 pages of written text, plus figures/tables.
Contributed Paper Limit: 10 pages of written text, plus figures/tables.
(Written text: 1 ½ spacing, 12 point font)

Monday, 25 May 1998

4:00-6:00 pm Registration (Main Lobby)

7:00-9:00 pm Dinner followed by Opening Reception (Cape Cod)

Tuesday, 26 May 1998

7:00-8:30 am Breakfast (Cape Cod)

8:30-8:45 am Welcome (Hyannisport E&W)
Conference Organizing Committee
Engineering Foundation

8:45-9:15 am (1) Keynote Presentation
Key Developments in High Temperature Structural Silicides
J.J. Petrovic
Los Alamos National Laboratory, Los Alamos, New Mexico, USA and A.K. Vasudevan
Office of Naval Research, Arlington, Virginia, USA

SESSION: MATERIALS I (Hyannisport E&W)
Session Chair: J.J. Petrovic, Los Alamos National Laboratory

9:15-10:00 am (2) Invited Presentation
Strong Monolithic and Composite MoSi2 Materials by Nanostructure Design
K. Niihara and Y. Suzuki
Osaka University, Osaka, Japan

10:00-10:45 am (3) Invited Presentation
Boron Doped Molybdenum Silicides for Structural Applications
M. Akinc
Iowa State University, Ames, Iowa, USA

10:45-11:00 am Coffee Break (Hyannisport E&W)

11:00-11:45 am (4) Invited Presentation
Development and Characterization of SiC(f)/MoSi2-Si3N4(p) Hybrid Composites
M.G. Hebsur
NASA Lewis Research Center, Cleveland, Ohio, USA

11:45-12:15 am (5) Fabrication of Zirconium Silicide Intermetallic Compounds With 16H-Type Crystal Structure
Y. Ikarashi
Tsuruoka Kogyo Koto Senmon Gakko, Yamagata, JAPAN, and T. Nagai and K. Ishizaki
Nagaoka Gijyutsu-Kagaku Daigaku, Niigata, JAPAN

12:15-12:45 am (43) Mo5Si3 Single Crystals: Physical Properties and Mechanical Behavior
F. Chu, D.J. Thoma, K. McClellan, and P. Peralta
Los Alamos National Laboratory, Los Alamos, New Mexico, USA

12:45-2:00 pm Lunch (Cape Cod)

SESSION: MATERIALS II (Hyannisport E&W)
Session Chair: M.V. Nathal, NASA-Lewis Research Center

2:00-2:45 pm (6) Invited Presentation
The Development of Mo-Si-B Alloys for Aerospace Applications
D.M. Berczik and M.V. Garguilo
Pratt & Whitney, West Palm Beach, Florida, USA

2:45-3:30 pm (7) Invited Presentation
A Comparison of MoSi2 Composites With Other Silicon-Base Structural Materials
E.L. Courtright
Pacific Northwest National Laboratory, Richland, Washington, USA

3:30-4:15 pm (8) Invited Presentation
TBA

4:15-4:45 pm (9) Microstructure and Mechanical Properties of Mo-Mo3Si- Mo5SiB2 Silicides
J.H. Schneibel, C.T. Liu, D.S. Easton, and C.A. Carmichael
Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA

4:45-5:00 pm Coffee Break (Hyannisport E&W)

5:00-5:30 pm (46) A Model for Calculating The Thermal Conductance of Functionally Gradient Materials
Qiulin Fan and Xingfand Hu
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, P.R. CHINA

5:30-6:00 pm (11) Investigation of Solid Solution Transition of Metal Disilicides
L.A. Dvorina
Institute for Problems of Materials, Ukrainian Academy of Sciences, Kiev, UKRAINE

6:00-6:30 pm (12 ) MoSi2-ZrO2 Composites with Fine-Grain Matrix
D. Yi and C. Li
Chalmers University of Technology, Gothenburg, SWEDEN

7:30- 9:00 pm Dinner (Cabana Tent)

9:00-10:00 pm Social Hour (Yacht Club)

Wednesday, 27 May 1998

7:00-8:30 am Breakfast (Cape Cod )

SESSION: MECHANICAL BEHAVIOR (Hyannisport E & W)
Session Chair: L. Kabacoff, Office of Naval Research

8:30-9:15 am (13) Invited Presentation
Brittle-Ductile Behavior of Single Crystals of Transition Metal Disilicides
M. Yamaguchi
Kyoto University, Kyoto, JAPAN

9:15-10:00 am (14) Invited Presentation
Alloying Effects on the Mechanical Properties of MoSi2
T.E. Mitchell
Los Alamos National Laboratory, Los Alamos, New Mexico, USA

10:00-10:45 am (15) Invited Presentation
Strength and Deformation Mechanism of C40-Based Single and Polycrystalline Silicides
Y. Umakoshi, T. Nakano, M. Kishimoto, D. Furuta, and K. Hagihara
Osaka University, Osaka, JAPAN

10:45-11:00 am Coffee Break (Hyannisport E&W)

11:00-11:45 am (16) Invited Presentation
Plasticity Enhancement Mechanisms in MoSi2
R. Gibala, H. Chang, C.M. Czarnik, and J.P. Campbell
The University of Michigan, Ann Arbor, Michigan, USA

11:45-12:15 pm (17) Plastic Deformation of Transition-Metal Disilicides With C11b and Its Derivative Structures
H. Inui, M. Moriwaki, and M. Yamaguchi
Kyoto University, Kyoto, JAPAN

12:15-12:45 pm (18) In Situ Straining Experiments on MoSi2 Single Crystals in an HVEM
S. Guder, M. Bartsch, and U. Messerschmidt
Max Planck Institute of Microstructure Physics, Halle/Saale, GERMANY;
. and M. Yamaguchi, Kyoto University, Kyoto, JAPAN

12:45-1:15 pm (45) Hot Hardness Testing of Single Crystal NbSi2 and TaSi2
S.A. Maloy, J.J. Petrovic, and T.E. Mitchell
Los Alamos National Laboratory, Los Alamos, New Mexico, USA

1:30-2:30 pm Lunch (Cape Cod)

2:30-6:30 pm Ad hoc discussions/free time

6:30-8:00 pm Dinner (Cape Cod)

SESSION: ATOMIC MECHANISMS
Session Chair: P. Angelini, Oak Ridge National Laboratory

8:00-8:45 pm (19) Invited Presentation
Microalloying for Ductility in Molybdenum Disilicide
M. Duesbery
Fairfax Materials Research Inc., Springfield, Virginia, USA ;
U. Waghmare and E. Kaxiras
Harvard University, Cambridge, Massachusetts, USA

8:45-9:15 pm (20) Directional Atomic Bonds in MoSi2
K. Tanaka, H. Inui, M. Yamaguchi, and M. Koiwa
Kyoto University, Kyoto, JAPAN

9:15-9:45 pm (21) Atomistic Potentials for the Molybdenum-Silicon System
M.I. Baskes
Sandia National Laboratories, Livermore, California, USA

10:00-11:00 pm Social Hour (Yacht Club)

Thursday, 28 May 1998

7:00-8:30 am Breakfast (Cape Cod)

SESSION: FABRICATION (Hyannisport E&W)
Session Chair: K. Jata, Wright-Patterson AFB

8:30-9:15 am (22) Invited Presentation
An Overview of Powder Processing of Silicides and Their Composites
N.S. Stoloff
Rensselaer Polytechnic Institute, Troy, New York, USA

9:15-10:00 am (23) Invited Presentation
Phase Identification in Reactively Sintered Molybdenum Disilicide Composites
K.K. Chawla
Univ. of Alabama at Birmingham, Birmingham, Alabama, USA;
J. Alba Jr.
New Mexico Tech, Socorro, New Mexico, USA;
J.J. Petrovic
Los Alamos Natl. Laboratory, Los Alamos, New Mexico, USA; R.L. Hexemer
Advanced Refractory Technologies, Lockport, New York, USA

10:00-10:30 am (24) The Improvement in Mechanical Properties of MoSi2 Through In Situ Crystallization of Grain Boundary Silica Glass by the Additions of Refractory Oxides
Y. Suzuki and K. Niihara
Osaka University, Osaka, Japan;
P.E.D. Morgan
Rockwell Science Center, Thousand Oaks, California, USA

10:30-10:45 am Coffee Break (Hyannisport E&W)

10:45-11:15 am (25) Preliminary Characterization of Plasma Sprayed MoSi2/Sigma SiC Fibre Monotapes
A.M. Baker and P.S. Grant
Oxford University, Oxford, UK;
R. Castro and H. Kung
Los Alamos National Laboratory, Los Alamos, New Mexico, USA

11:15-11:45 am (26) Fabrication of Silicides Materials and Their Composites by Reaction Sintering
R. Scholl, A. Böhm, and B. Kieback
Fraunhofer Institute for Applied Materials Research, Dresden, GERMANY

11:45-12:15 pm (27) Evaluation of Vapor Deposited Nb/Nb5Si3 Microlaminates
A.J. Gavens, D. Van Heerden, and T.P. Weihs
The Johns Hopkins University, Baltimore, Maryland, USA;
T. Foecke
National Institute of Standards and Technology, Gaithersburg, Maryland, USA

12:15-12:45 pm (28) Self-Propagating Formation Reactions in Nb/Si Multilayers
M.E. Reiss, C.M. Esber, D. Van Heerden, A.J. Gavens, and T.P. Weihs
The Johns Hopkins University, Baltimore, Maryland, USA

1:00-2:00 pm Lunch (Cape Cod)

SESSION: PROPERTIES (Hyannisport E&W)
Session Chair: W. Simmons, Army Research Office

2:00-2:45 pm (29) Invited Presentation
Interdiffusion and Diffusion Structure Development in Selected Refractory Metal Silicides
M.A. Dayananda and P.C. Tortorici
Purdue University, West Lafayette, Indiana, USA

2:45-3:30 pm (30) Invited Presentation
Review of Creep and Fatigue Behavior of Silicides and Their Composites
K. Sadananda and C.R. Feng
Naval Research Laboratory, Washington, DC, USA;
R. Mishra
DMRL Hyderebad, INDIA,.
S.C. Deevi
Phillip Morris Research Center, Richmond, Virginia, USA

Coffee will be served in the back of the room at 3:30 pm

3:30-4:00 pm (31) Low Temperature Oxidation Behavior of a MoSi2 Composite
J. Chen, C. Li, Z. Fu, and X. Tu
Chalmers University of Technology, Göteborg, SWEDEN;
H. Arwin
Linköping Institute of Technology, Linköping, SWEDEN;
M. Sundberg
Kanthal AB, Hallstahammar, SWEDEN;
R. Pompe, Swedish Ceramic Institute, Göteborg, SWEDEN

4:00-4:30 pm (32) Wear of MoSi2 and MoSi2-Base Composites by Hard Particles at Room and Elevated Temperatures
D.E. Alman, J.H. Tylzcak, and J.A. Hawk
U.S. Department of Energy Albany Research Center, Albany, Oregon, USA

4:30-5:00 pm (33) Effect of Microstructure on the Indentation Response of MoSi2
A. Newman, S. Sampath, and H. Herman
State University of New York at Stony Brook, Stony Brook, New York, USA

5:00-5:30 pm (34) The 1100 oC Isothermal Section of the Ti-Ni-Si Ternary Systems
H. Xiaohua, C. Guoliang, N. Kequan, L. Yimin and Qiyuan
University of Science and Technology, Beijing, P.R.CHINA

5:30-6:00 pm (44) Residual Thermal Stresses in MoSi2-Mo5Si3 In-Situ Composites
P Peralta, R. Dickerson, J.R. Michael, K.J. McClellan, F. Chu, and T.E. Mitchell
Los Alamos National Laboratory, Los Alamos, New Mexico, USA

6:30-8:00 pm Dinner and Social Hour (Cabana Tent)

Friday, 29 May 1998

7:00-8:30 am Breakfast (Cape Cod)

SESSION: APPLICATIONS (Hyannisport E&W)
Session Chair: J. Schneibel, Oak Ridge National Laboratory

8:30-9:15 am (35) Invited Presentation
Improvement of Mechanical Properties of Si3N4/MoSi2 and Si3N4 /SiC Composites by Controlling Structure
K. Yamada and N. Kamiya
Toyota Central R&D Laboratory, Aichi-ken, JAPAN

9:15-9:45 am (36) Durability of Molybdenum Silicide Materials in Molten Alkali Borosilicate Glass
Y.S. Park, R.G. Castro, K. Hollis, J.J. Petrovic, and D.P. Butt
Los Alamos National Laboratory, Los Alamos, New Mexico, USA

9:45-10:15 am (37) HSR/EPM Combustor Materials Development Program
D. Brewer
NASA Lewis Research Center, Cleveland, Ohio, USA

10:15-10:30 am Coffee Break (Hyannisport E&W)

10:30-11:00 am (38) Oxidation and Hot Corrosion of MoSi2-Si3N4 Base Composites
R.W. Kowalik
Naval Air Warfare Center Aircraft Division, Patuxent River, Maryland, USA;
M.G. Hebsur
NASA Lewis Research Center, Cleveland, Ohio, USA

11:00-11:30 am (39) Low Temperature Oxidation of Fully Dense and Porous MoSi2
K. Kurokawa, H. Houzumi, and H. Takahashi
Hokkaido University, Sapporo, JAPAN

11:30-12:00 noon (40) Applications of Molybdenum Disilicide Composites Produced by Plasma Spraying
R.G. Castro, H. Kung, K.J. Hollis, and J.J. Petrovic
Los Alamos National Laboratory, Los Alamos, New Mexico, USA

12:00-12:30 pm (42) Processing and Characterization of Composites Based on Molysilicides
S.C. Deevi and A.C. Lilly
Phillip Morris Corp., Richmond, Virginia, USA

12:30-2:00 pm Lunch (Cape Cod)

SESSION: GENERAL DISCUSSION
Session Chair: A.K. Vasudevan, Office of Naval Research

2:00-3:30 pm General group discussion of needs and directions for high temperature structural silicides

3:30 pm Conference Adjournment

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