Zobrazeno 1 - 10
of 15
pro vyhledávání: '"J. K. West"'
Publikováno v:
Philosophical Magazine A. 82:3163-3176
Observations of characteristic markings on the fracture surface of brittle materials can be used to quantitatively describe non-equilibrium fracture. The relationship between quantitative fractography and fracture mechanics is first presented to desc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83231e2cf0406c4cb4b9bf723f2a45c3
https://doi.org/10.1080/01418610208240430
https://doi.org/10.1080/01418610208240430
Autor:
L. L. Hench, J. K. West
Publikováno v:
Philosophical Magazine A. 77:85-113
A quantitative fracture model is presented for slow crack growth in amorphous silica. The model is based on semiempirical quantum molecular orbital calculations using the Austin method AM1. The fracture of three-, four-, five- and six-member silica r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67cc08d5ac1cbd8dc7a3897436b89338
https://doi.org/10.1080/01418619808214232
https://doi.org/10.1080/01418619808214232
Autor:
L. L. Hench, J. K. West
Publikováno v:
Journal of Materials Science. 30:6281-6287
In part I, a ring contraction model was proposed as the basic mechanism of slow crack growth in silica glass. AM1 molecular orbital theory running on a CAChe workstation was used to find the transition state for the contraction of a 4-fold ring into
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0e49c8f0ed9dae32dce116d1f32fc57
https://doi.org/10.1007/bf00369678
https://doi.org/10.1007/bf00369678
Autor:
L. L. Hench, J. K. West
Publikováno v:
Annual Review of Materials Science. 25:37-68
Amorphous silica (a-silica) has a distribution of various ring sizes. It is generally known that these rings vary in size from 2-member rings through 6-member (or possibly higher) rings of silica tetrahedra. These silica rings, as well as chains, are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db0e1eae063bd065ef4dd3ab2996f851
https://doi.org/10.1146/annurev.ms.25.080195.000345
https://doi.org/10.1146/annurev.ms.25.080195.000345
Autor:
L. L. Hench, J. K. West
Publikováno v:
Journal of Materials Science. 29:5808-5816
A quantitative model of environmentally sensitive crack growth of amorphous silica (a-silica) is based upon semiempirical molecular orbital (MO) calculations (AM-1 method) of a water molecule interacting with strained three- and four-fold silica ring
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b8eec87a889f88b0b01b7b9b64fa81dc
https://doi.org/10.1007/bf00366861
https://doi.org/10.1007/bf00366861
Autor:
J. K. West, L. L. Hench
Publikováno v:
Journal of Materials Science. 29:3601-3606
A quantitative ring contraction model for the fracture of amorphous silica is described based upon AM-1 semiempirical molecular orbital calculations of strained three- and four-fold silica rings and a five-fold ring-chain structure. The fracture barr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::066af371db77e6fd5149733b3604e273
https://doi.org/10.1007/bf00357324
https://doi.org/10.1007/bf00357324
Publikováno v:
Journal of Sol-Gel Science and Technology. 2:723-728
Type VI sol-gel silica monoliths with 32 A and 45 A pore radii were made using tetramethylsiloxane (TMOS) with HF as a catalyst. The pore texture was characterized using nitrogen absorption/desorption isotherms and BET analysis. Monoliths thermally s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::18b2d003cfaaad13f4daf7358be5614b
https://doi.org/10.1007/bf00486338
https://doi.org/10.1007/bf00486338
Autor:
J. K. West, M. C. S. Nobrega
Publikováno v:
Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials—B: Ceramic Engineering and Science Proceedings
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cce7e144cf49ac8fadbb5e6423f4aba5
https://doi.org/10.1002/9780470314555.ch52
https://doi.org/10.1002/9780470314555.ch52
Publikováno v:
Journal of biomedical materials research. 41(1)
The development of a zero net shrinkage dental restorative material based upon a polymer-bioactive-glass composite requires a second-phase material that expands. This study details the mechanisms of organic cyclic anhydride ring expansion via hydroly
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::c9d485893f155c1bd1cc8e7689880359
https://pubmed.ncbi.nlm.nih.gov/9641619
https://pubmed.ncbi.nlm.nih.gov/9641619
Publikováno v:
Journal of biomedical materials research. 37(4)
A research program was initiated with both experimental and computational chemistry based molecular modeling components to investigate specific amino acid-surface interactions. The experimental portion of this study, with details reported elsewhere,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::7758c37c1eacfe89fce0033fc71e2e29
https://pubmed.ncbi.nlm.nih.gov/9407308
https://pubmed.ncbi.nlm.nih.gov/9407308