Zobrazeno 1 - 10
of 86
pro vyhledávání: '"D. Lynn Johnson"'
Publikováno v:
Journal of the American Ceramic Society. 88:59-65
Microstructural evolution during simple solid-state sintering of two-dimensional compacts of elongated particles packed in different arrangements was simulated using a kinetic, Monte Carlo model. The model used simulates curvature-driven grain growth
Publikováno v:
Journal of Thermal Spray Technology. 13:51-56
Tantalum (Ta) oxide, due to its high-temperature capabilities and thermal expansion coefficient similar to silicon nitride, is a promising candidate for environmental barriers for silicon (Si) nitride-based ceramics. This paper focuses on the develop
Publikováno v:
Journal of Materials Research. 18:988-993
A multistep technique has been developed for the generation of metallic/alloy nanoparticles coated with amorphous silica. As a proof of concept, an inert-gas blown-arc geometry was used to create nanoparticles from a bulk nickel source, and silica co
Autor:
D. Lynn Johnson, Donggy Sohna
Publikováno v:
Cement and Concrete Research. 32:557-563
Little fundamental understanding of hardening of cement-based materials can be derived from the standard tests, such as the Vicat needle (ASTM C191-82) and penetration resistance (ASTM 403) tests. A new instrumented penetration test has been develope
Publikováno v:
Applied Surface Science. 181:173-178
Protectively and functionally coated magnetic nanoparticles are of special interest because of their important technological applications in diverse fields, ranging from biotechnology to transportation. In this paper, monolayer and bilayer surfactant
Autor:
D. Lynn Johnson
Publikováno v:
FARMS Review of Books. 12:21-38
Autor:
Donggy Sohn, D. Lynn Johnson
Publikováno v:
Cement and Concrete Research. 29:241-247
Microwave energy can be applied on the curing of the cementitious materials because of their water content. Isothermal heating, achieved best by feedback temperature control, is required to investigate properly the temperature effects on the properti
Autor:
Thomas O. Mason, Jin Ha Hwang, D. Lynn Johnson, B. R. Elliott, Mao H. Teng, Vinayak P. Dravid, J. J. Host
Publikováno v:
Journal of Materials Research. 12:1268-1273
Graphite encapsulated nanocrystals produced by a low carbon tungsten arc were analyzed to determine their chemistry, crystallography, and nanostructural morphology. Metallic nanocrystals of Fe, Co, and Ni are in the face-centered cubic (fcc) phase, a
Publikováno v:
Journal of Materials Research. 12:724-737
An optimized chemical vapor infiltration (CVI) process has conditions that promote complete densification at the fastest allowable reaction rate. In order to help define optimum conditions, a model has been developed to simulate the CVI of a fibrous
Autor:
Hunghai Su, D. Lynn Johnson
Publikováno v:
Journal of the American Ceramic Society. 79:3199-3210
Small cylindrical tubes were sintered in a microwave- induced oxygen plasma, initiated and sustained inside a tunable, single-mode cavity. Temperature and shrinkage measurements of the specimens were achieved using an optical-fiber thermometer black-