logging in or signing up oxinitrideglazen Mattia Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINTLite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 53 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: January 09, 2008 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Final presentation MDP3: Oxynitride glasses: a closer look: Final presentation MDP3: Oxynitride glasses: a closer look MDP 3: Sjoerd Stelwagen Peter Kalisvaart Angela van Haaren Kelly van den HoutStructure of this presentation: Structure of this presentation Introduction: What is an oxynitride glass? Properties of oxynitride glass vs. oxide glass Potential applications of oxynitride glass Foamglass Hip prostheses Closure Financial reportWhat is an oxynitride glass?: What is an oxynitride glass? Network formers/modifiers N replaces O More crosslinking Changes in the propertiesChanges in the properties: Changes in the properties Increase in: Chemical durability Resistance to subcritical crack growth Fracture toughness Young’s modulus Hardness Decrease in: Thermal expansion coefficientPotential application (1): Foamglass: Potential application (1): Foamglass Introduction Present situation Possible improvements How to incorporate nitrogen? Current process (Corning) Alternatives ConclusionIntroduction: Introduction Foamglass Advantageous properties (good thermal insulator, non-toxic, high strength) Used in: Buildings to insulate walls, roofs and heavily loaded floors Industry to insulate pipes FoamglassPresent situation: Present situation Problem: Subcritical crack growth Continuous mechanical stress Chemical attack by reactive species Especially in foundations: Large stresses for very long time (decades) Chemical environment difficult to control FoamglassPossible improvements: Possible improvements Important properties Resistance to subcritical crack growth Fracture toughness Chemical durability Oxynitride glass Advantages Disadvantages FoamglassOxynitride for foamglass (1): Oxynitride for foamglass (1) Advantages Increase in: Resistance to subcritical crack growth Fracture toughness Chemical durability FoamglassOxynitride for foamglass (2): Oxynitride for foamglass (2) Oxynitride glass: disadvantages Insulating capacity will most likely decrease Stresses due to thermal expansion may increase as well FoamglassHow to incorporate nitrogen? (1): How to incorporate nitrogen? (1) Current process (Corning) FoamglassHow to incorporate nitrogen? (2): How to incorporate nitrogen? (2) Alternatives Rennes: Oxide glass + AlN in oxygen atmosphere Carbothermic preparation: Oxide glass + carbon in nitrogen atmosphere FoamglassConclusion: Conclusion Oxynitride glass is an improvement because of a higher resistance to crack growth Adapting the current process should be possible, though a lot of side reactions are possible Economic benefit is yet to be evaluated. FoamglassPotential application (2): Hip prostheses: Potential application (2): Hip prostheses Introduction Present situation Possible improvements ConclusionIntroduction: Introduction Total hip replacement rheumatoid arthritis osteoarthritis osteonecrosis seldom because of fractures Hip prosthesesPresent situation (1): Present situation (1) Classical artificial hip: UHMWPE cup metal or ceramic ball metal femoral stem Problem: aseptic loosening Hip prosthesesPresent situation (2): Present situation (2) First attempt to solve problem: Ceramic on ceramic (COC) couples Indication from medical world: COC bearings release too many particles which can be harmful for the human body Hip prosthesesPossible improvements (1) Overhead-sheet: Possible improvements (1) Overhead-sheet Hip prosthesesPossible improvements (2): Possible improvements (2) Mechanical properties Compressive strength Fracture toughness Young’s modulus Hardness Hip prosthesesPossible improvements (3): Possible improvements (3) Surface properties hydrophilicity surface roughness scratch resistance Hip prosthesesPossible improvements (4): Possible improvements (4) Wear properties Effect of wear particles (in-vivo) UHMWPE Ceramic Glass Hip prosthesesConclusion: Conclusion Glass will most likely release less wear particles than ceramic The wear properties of oxynitride glass should be investigated further Hip prosthesesClosure: Closure Oxynitride glass has potential for both foamglass and hip prostheses Financial report: Financial report Word of gratitude: Word of gratitude We would like to thank the following persons: dr H.T. Hintzen ir D. de Graaf ir R.X.E. Willemse dr ir L.J.M.G. Dortmans dr C.C. van Donkelaar prof dr ir H.W.J. Huiskes dr K. de Smet You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
oxinitrideglazen Mattia Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINTLite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 53 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: January 09, 2008 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Final presentation MDP3: Oxynitride glasses: a closer look: Final presentation MDP3: Oxynitride glasses: a closer look MDP 3: Sjoerd Stelwagen Peter Kalisvaart Angela van Haaren Kelly van den HoutStructure of this presentation: Structure of this presentation Introduction: What is an oxynitride glass? Properties of oxynitride glass vs. oxide glass Potential applications of oxynitride glass Foamglass Hip prostheses Closure Financial reportWhat is an oxynitride glass?: What is an oxynitride glass? Network formers/modifiers N replaces O More crosslinking Changes in the propertiesChanges in the properties: Changes in the properties Increase in: Chemical durability Resistance to subcritical crack growth Fracture toughness Young’s modulus Hardness Decrease in: Thermal expansion coefficientPotential application (1): Foamglass: Potential application (1): Foamglass Introduction Present situation Possible improvements How to incorporate nitrogen? Current process (Corning) Alternatives ConclusionIntroduction: Introduction Foamglass Advantageous properties (good thermal insulator, non-toxic, high strength) Used in: Buildings to insulate walls, roofs and heavily loaded floors Industry to insulate pipes FoamglassPresent situation: Present situation Problem: Subcritical crack growth Continuous mechanical stress Chemical attack by reactive species Especially in foundations: Large stresses for very long time (decades) Chemical environment difficult to control FoamglassPossible improvements: Possible improvements Important properties Resistance to subcritical crack growth Fracture toughness Chemical durability Oxynitride glass Advantages Disadvantages FoamglassOxynitride for foamglass (1): Oxynitride for foamglass (1) Advantages Increase in: Resistance to subcritical crack growth Fracture toughness Chemical durability FoamglassOxynitride for foamglass (2): Oxynitride for foamglass (2) Oxynitride glass: disadvantages Insulating capacity will most likely decrease Stresses due to thermal expansion may increase as well FoamglassHow to incorporate nitrogen? (1): How to incorporate nitrogen? (1) Current process (Corning) FoamglassHow to incorporate nitrogen? (2): How to incorporate nitrogen? (2) Alternatives Rennes: Oxide glass + AlN in oxygen atmosphere Carbothermic preparation: Oxide glass + carbon in nitrogen atmosphere FoamglassConclusion: Conclusion Oxynitride glass is an improvement because of a higher resistance to crack growth Adapting the current process should be possible, though a lot of side reactions are possible Economic benefit is yet to be evaluated. FoamglassPotential application (2): Hip prostheses: Potential application (2): Hip prostheses Introduction Present situation Possible improvements ConclusionIntroduction: Introduction Total hip replacement rheumatoid arthritis osteoarthritis osteonecrosis seldom because of fractures Hip prosthesesPresent situation (1): Present situation (1) Classical artificial hip: UHMWPE cup metal or ceramic ball metal femoral stem Problem: aseptic loosening Hip prosthesesPresent situation (2): Present situation (2) First attempt to solve problem: Ceramic on ceramic (COC) couples Indication from medical world: COC bearings release too many particles which can be harmful for the human body Hip prosthesesPossible improvements (1) Overhead-sheet: Possible improvements (1) Overhead-sheet Hip prosthesesPossible improvements (2): Possible improvements (2) Mechanical properties Compressive strength Fracture toughness Young’s modulus Hardness Hip prosthesesPossible improvements (3): Possible improvements (3) Surface properties hydrophilicity surface roughness scratch resistance Hip prosthesesPossible improvements (4): Possible improvements (4) Wear properties Effect of wear particles (in-vivo) UHMWPE Ceramic Glass Hip prosthesesConclusion: Conclusion Glass will most likely release less wear particles than ceramic The wear properties of oxynitride glass should be investigated further Hip prosthesesClosure: Closure Oxynitride glass has potential for both foamglass and hip prostheses Financial report: Financial report Word of gratitude: Word of gratitude We would like to thank the following persons: dr H.T. Hintzen ir D. de Graaf ir R.X.E. Willemse dr ir L.J.M.G. Dortmans dr C.C. van Donkelaar prof dr ir H.W.J. Huiskes dr K. de Smet