DOPING EFFECTS ON INDENTATION PLASTICITY AND FRACTURE IN GERMANIUM
Vickers micro-indentation tests have been performed in the temperature range 20 to 420° C on the {0 0 1} surfaces of germanium crystals of three different dopings: "intrinsic", heavily doped p-type and heavily doped n-type. Indentation sizes, dislocation rosette sizes and median/radial cra...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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Kluwer Academic Publishers
1985
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| _version_ | 1826257082803814400 |
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| author | Roberts, S Pirouz, P Hirsch, P |
| author_facet | Roberts, S Pirouz, P Hirsch, P |
| author_sort | Roberts, S |
| collection | OXFORD |
| description | Vickers micro-indentation tests have been performed in the temperature range 20 to 420° C on the {0 0 1} surfaces of germanium crystals of three different dopings: "intrinsic", heavily doped p-type and heavily doped n-type. Indentation sizes, dislocation rosette sizes and median/radial crack lengths were measured. Rosette sizes were found to depend strongly on doping, being respectively larger and smaller than in intrinsic material for n-type and p-type specimens, over the temperature range 20 to 420° C. This result correlates well with dislocation velocity measurements in germanium. Indentation size (hardness) was found to vary with doping above ~ 300° C, hardness increasing from n-type through intrinsic to p-type material. Crack lengths, as a function of temperature, showed a sharp transition (to much shorter crack lengths) at a well-defined temperature; this ductile/brittle transition temperature was found to depend on doping, being lowest for n-type (~ 290° C) and highest for p-type (~ 400° C). This is the first observation of a relation between a fracture parameter and bulk electronic doping. © 1985 Chapman and Hall Ltd. |
| first_indexed | 2024-03-06T18:12:29Z |
| format | Journal article |
| id | oxford-uuid:03802a31-13d0-4d75-8ab4-d6e5a25290f0 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:12:29Z |
| publishDate | 1985 |
| publisher | Kluwer Academic Publishers |
| record_format | dspace |
| spelling | oxford-uuid:03802a31-13d0-4d75-8ab4-d6e5a25290f02022-03-26T08:46:33ZDOPING EFFECTS ON INDENTATION PLASTICITY AND FRACTURE IN GERMANIUMJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:03802a31-13d0-4d75-8ab4-d6e5a25290f0EnglishSymplectic Elements at OxfordKluwer Academic Publishers1985Roberts, SPirouz, PHirsch, PVickers micro-indentation tests have been performed in the temperature range 20 to 420° C on the {0 0 1} surfaces of germanium crystals of three different dopings: "intrinsic", heavily doped p-type and heavily doped n-type. Indentation sizes, dislocation rosette sizes and median/radial crack lengths were measured. Rosette sizes were found to depend strongly on doping, being respectively larger and smaller than in intrinsic material for n-type and p-type specimens, over the temperature range 20 to 420° C. This result correlates well with dislocation velocity measurements in germanium. Indentation size (hardness) was found to vary with doping above ~ 300° C, hardness increasing from n-type through intrinsic to p-type material. Crack lengths, as a function of temperature, showed a sharp transition (to much shorter crack lengths) at a well-defined temperature; this ductile/brittle transition temperature was found to depend on doping, being lowest for n-type (~ 290° C) and highest for p-type (~ 400° C). This is the first observation of a relation between a fracture parameter and bulk electronic doping. © 1985 Chapman and Hall Ltd. |
| spellingShingle | Roberts, S Pirouz, P Hirsch, P DOPING EFFECTS ON INDENTATION PLASTICITY AND FRACTURE IN GERMANIUM |
| title | DOPING EFFECTS ON INDENTATION PLASTICITY AND FRACTURE IN GERMANIUM |
| title_full | DOPING EFFECTS ON INDENTATION PLASTICITY AND FRACTURE IN GERMANIUM |
| title_fullStr | DOPING EFFECTS ON INDENTATION PLASTICITY AND FRACTURE IN GERMANIUM |
| title_full_unstemmed | DOPING EFFECTS ON INDENTATION PLASTICITY AND FRACTURE IN GERMANIUM |
| title_short | DOPING EFFECTS ON INDENTATION PLASTICITY AND FRACTURE IN GERMANIUM |
| title_sort | doping effects on indentation plasticity and fracture in germanium |
| work_keys_str_mv | AT robertss dopingeffectsonindentationplasticityandfractureingermanium AT pirouzp dopingeffectsonindentationplasticityandfractureingermanium AT hirschp dopingeffectsonindentationplasticityandfractureingermanium |