Expert in Ceramics: Fabrication, Fracture, Powder Dispersion, Alumina, Nano-materials; Tapecasting, Creep, Sintering
Expert ID: 712373 Idaho, USA
Expert was in charge of the mechanical testing facility at Rutgers Center for Ceramic Research. This included universal testing machines, hardness testers, creep machines, static fatigue, and continuous feed high temperature testing. He has also taught the basic graduate level mechanical properties of ceramics course from 1982 to 2007. He can answer in-depth questions regarding ceramic toughness, static fatigue, and impact energy.
Expert's Ph.D thesis was on the subject of creep of aluminum oxide. He has published two extensive review articles on creep of ceramics in the Journal of Material Science. Currently, he directs a thesis on the topic of creep of silicon nitride and superplasticity of zirconia nanocrystalline composites.
Expert has taught three short courses on the subject of ceramic-ceramic composites. He has studied the effect of bridging by fibers and whiskers on the stress intensity factor at the crack tip. In order to do this he developed a new technique using a Raman microscope to measure stresses at the crack tip.
After retirement Expert consulted regularly with Idaho National Laboratory on improved processing of fuel pellets. He studied isostatic pressing of ceria as a surrogate for nuclear fuels. He also developed a model for calculating green strength of pellets.
Much of Expert's career has been spent in powder processing. He has directed many studies which used particle size distribution measurements, zeta potential measurements and rheology of slips measurements.
Expert's experience with binders is largely with tape casting binders and plasticizers. He has studied the interaction between them, the effect of water, their ability to act as a dispersant, their ability to impart strength (tested tensile specimens) and their burnout qualities.
Expert has lead an effort to fabricate composites by infiltrating blackglas@ with inert and active fillers into woven Nextel 320 fibers. He has tested the following mechanical properties: tensile, bending, compression and shear strength at room temperature, elastic modulus and creep.
Several of Expert's students have studied tape casting of alumina substrates.
Starting with his own Ph.D thesis he has made creep studies (with his students) numerous times. He has studied creep of superplastic materials, silicon nitride, fiber composites, YAG and nano-alumina/zirconia.
Expert and students have made ASTM standard bending tests for individual industrial sponsors. Expert has directed a student in making hydraulic burst and ball on ring fracture tests and studied the Weibull distributions and shape factors.
He has directed a student in Weibull statistics measurements. He has taught techniques for analyzing the statistics and time dependent behavior and has initiated such an effort with a company for which he consults to improve reliability.
Expert has taught colloidal chemistry as it is applied to dispersion of ceramic powder. He has directed several theses on the subject and consulted with industry on this subject.
During his last few years at Rutgers University he studied sintering. One of his students defended her thesis on the subject sintering parameter measurement for silicon nitride. She studied second stage liquid phase sintering. Two students have studied anisotropy during sintering. He have filed a patent disclosure for a method of reducing or eliminating anisotropy.
For almost his entire career Expert has lead graduate student research in tape casting and is widely sited in the literature on the subject. This research has included organic additive, the effect of water in non-aqueous systems, aqueous tape casting, anisotropic shrinkage, defects, and aqueous and non-aqueous dispersants.
While at MIT Expert synthesized silicon nitride by a laser heating method and studied sintering of silicon and silicon nitride. At Rutgers he studied carbothermal reduction and nitridation of silicon nitride powder, One student studied creep and another sintering of silicon nitride.
Is a regular consultant for Idaho National Laboratory on the topic of ceramic processing of reprocessed nuclear fuel (MOX).Recently helped a company establish a program for evaluating statistical and time dependent failure of glass parts. Has consulted on tape casting and organic additives towards better dispersion of powder.
|Year: 1971||Degree: PhD||Subject: Materials Science/Ceramics||Institution: Stanford University|
|Year: 1967||Degree: MS||Subject: Materials Science||Institution: Stanford University|
|Year: 1965||Degree: BS||Subject: Ceramic Engineering||Institution: University of Utah|
|Years: 2007 to 2015||Employer: Idaho National Laboratory||Title: Consultant||Department:|
Responsibilities:Consulted on a regular basis, approximately once a week. LDRD project concerned the development of improved nuclear fuel processing.
|Years: 1980 to 2007||Employer: Rutgers University||Title: Professor II (Distiguished)||Department: Materials Science/Ceramics|
Responsibilities:He served as Graduate Director 1993-2002 and as Vice Chair 2002-2006.
|Years: 1976 to 1980||Employer: MIT||Title: Research Associate||Department: Materials Science/Ceramic Division-Energy Lab|
MHD electrode study
Co-PI DOD Laser Synthesis of Powders
|Years: 1974 to 1976||Employer: TRW||Title: Research Staff||Department:|
Responsibilities:Sodium Sulfur Batteries
|Years: 1972 to 1974||Employer: University of Utah||Title: Research Associate||Department: Materials Science Department|
Responsibilities:For one year, he taught a course. In his second year, he was a Research Associate studying sodium sulfur batteries.
|Associations / Societies|
|Expert is a Fellow of the American Ceramic Society and has organized and chaired sessions of meetings.
He has been on the international organizing committee of several conferences, including Sintering 2008.
|Expert has served as an editor for communications of the American Ceramic Society.|
|Awards / Recognition|
|One of Expert's students received the outstanding thesis award at Rutgers and the Wigner award for a fellowship to Oak Ridge National Laboratory (first one ever awarded to the high temperature laboratory)|
|Publications and Patents Summary|
|Expert has an excess of one hundred publications in books and journals. He holds two patents|
|Expert Witness Experience|
|He has been involved in one liability case as an expert witness. The case was settled prior to going to court.|
|Training / Seminars|
| Expert taught the graduate course in mechanical properties of ceramics (25 yrs), graduate course in colloidal chemistry in ceramic system (10 yrs), graduate course in High Temperature Materials (3 yrs), part of graduate Course in Thermodynamics, and several undergraduate courses in ceramics including laboratory courses.
He participated in teaching at the Center for Professional Advancement courses for approximately ten years both in the US and Europe. These included Organic Additives, New Technologies in Ceramics, etc.
Directed: Sintering of Ceramics Course for the American Ceramic Society. He has also taught o courses at the University of Wisconsin and for the Army.
|Expert participated with graduate students in locating vendors.|
|Expert has consulted for numerous companies both in ceramic processing and mechanical properties.|
|Other Relevant Experience|
|Expert has interacted with companies who sponsored his research.|
|German||Expert spoke fluent German after spending 2 1/2 years at age 20-23 in Germany. He still can speak and understand German well.|
Fields of Expertise
ceramic powder processing, ceramic binder, ceramic composite, nanocrystalline ceramics, quenched ceramics, alumina substrate, ceramic creep, ceramic fracture strength, ceramic material reliability improvement, ceramic particle suspension, ceramic sintering, doctor blade tape casting, high-temperature non-oxide ceramic material, monolithic ceramic, ceramic composite testing, advanced ceramic material, ceramic component, ceramic mechanical property, ceramic physical property, ceramic tape, ceramic bearing, ceramic powder, particulate ceramics processing, ceramic property characterization, ceramic property measurement, ceramic powder characterization technology, carbothermal reduction, ceramic deformation analysis, ceramic dry pressing, ceramic slip casting, ceramic packaging material, ceramic package, ceramic failure, ceramic hot isostatic pressing, ceramic slip, spray drying, ceramic failure analysis, ceramic processing, ceramic capacitor