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| 1 | Property mapping of polycrystalline diamond coatings over large area显示文摘Large-area polycrystalline diamond(PCD)coatings are important for fields such as thermal management,optical windows,tribological moving mechanical assemblies,harsh chemical environments,biological sensors,etc.Microwave plasma chemical vapor deposition(MPCVD)is a standard technique to grow high-quality PCD films over large area due to the absence of contact between the reactive species and the filament or the chamber wall.However,the existence of temperature gradients during growth may compromise the desired uniformity of the final diamond coatings.In the present work,a thick PCD coating was deposited on a 100-mm silicon substrate inside a 915-MHz reactor;the temperature gradient resulted in a non-uniform diamond coating.An attempt was made to relate the local temperature variation during deposition and the different properties of the final coating.It was found that there was large instability inside the system,in terms of substrate temperature(as high asΔT=212℃),that resulted in a large dispersion of the diamond coating’s final properties:residual stress(-15.8 GPa to+6.2 GPa),surface morphology(octahedral pyramids with(111)planes to cubo-octahedrals with(100)flat top surfaces),thickness(190μm to 245μm),columnar growth of diamond(with appearance of variety of nanostructures),nucleation side hardness(17 GPa to 48 GPa),quality(Raman peak FWHM varying from 5.1 cm^(-1) to 12.4 cm^(-1) with occasional splitting).This random variation in properties over large-area PCD coating may hamper reproducible diamond growth for any meaningful technological application. | Awadesh Kumar MALLIK Sandip BYSAKH Monjoy SREEMANY Sudakshina ROY Jiten GHOSH Soumyendu ROY Joana Catarina MENDES Jose GRACIO Someswar DATTA | 2014 | Journal of Advanced Ceramics2014，3，1： | 4 |
| 2 | Determination of Biaxial Modulus of Chemical Vapor-deposited Diamond Films显示文摘 | Fan Q H Gracio J Pereira E | 2001 | Thin Solid Films2001，，： | 1 |
| 3 | Human microvascular endothelial cell seeding on Cr-DLC thin films for heart valve applications显示文摘 | N. Ali Y. Kousar J. Gracio E. Titus T. I. Okpalugo V. Singh M. Pease A. A. Ogwu E. I. Meletis W. Ahmed M. J. Jackson | 2006 | Journal of Materials Engineering and Performance2006，，2： | 1 |
| 4 | Residual Stresses in Chemical Vapour Deposited Diamond Films 显示文摘 | Fan Q H Gracio J Pereira E | 2000 | Diamond and Related Materials2000，9，： | 1 |
| 5 | Diamond Coating on Steel with a Titanium Interlayer显示文摘 | Fan Q H Fernandes A Gracio J | 1998 | Diamond and Related Materi- als1998，7，2： | 1 |
| 6 | COL1A1 Sp1-binding site polymorphism as a risk factor for genital prolapse显示文摘 | Andrea Moura Rodrigues Manoel Jo?o Batista Castello Gir?o Ismael Dale Cotrim Guerreiro Silva Marair Gracio Ferreira Sartori Karina de Falco Martins Rodrigo de Aquino Castro | 2008 | International Urogynecology Journal2008，，11： | 1 |
| 7 | An experimental and theoretical analysis on the application of stress -based forming limit criterion 显示文摘 | BUTUC M C GRACIO J J BARATA DA ROCHA A | 2006 | International Journal of Mechanical Sciences2006，48，4： | 1 |
| 8 | Control System of a Mini Hydraulic Press for Evaluating Springback in Sheet Metal Forming显示文摘 | SUN P GRACIO J J FERREIRA J A | 2006 | Journal of Materials Processing Technology2006，176，13： | 1 |
| 9 | Preparation of freestanding diamond films by a two-step-growth method 显示文摘 | FAN Q F PEREIRA E GRACIO J | 1998 | Journal of Materials Research1998，13，： | 1 |
| 10 | Nickel assisted sintering of Ti3SiC2 powder under pressureless conditions显示文摘 | PANIGRAHI B B REDDY N S BALAKRISHNAN A CHO M C GRACIO J J | 2010 | Journal of Alloys and Compounds2010，505，1： | 1 |
| 11 | Evaluation of aherence of diamond coating by indentation method 显示文摘 | FAN Q H FERNANDES A PEREIRA E GRACIO J | 1999 | Vacuum1999，52，： | 1 |
| 12 | The changing paradigm of data- intensive computing 显示文摘 | Kouzes R T Anderson G A Elbert S T and Gracio D K | 2009 | IEEE Computer2009，42，1： | 1 |
| 13 | Development of a one point quadrature shell element for nonlinear applications with contact and anisotropy 显示文摘 | Cardoso R P R Yoon J W Gracio J J | 2002 | Comput Meth Appl Mech Engng2002，191，45： | 1 |
| 14 | Hydroxyapatite modified with carbon-nanotubereinforced poly(methyl methacrylate): A nanocomposite material for biomedical applications显示文摘 | Singh M K Shokuhfar T De Almeida Gracio J J | 2008 | Adv Funct Mater2008，18，5： | 1 |
| 15 | Evaluation of residual stresses in chemical - vapor - deposited diamond films显示文摘 | GRACIO J PEREIRA E | 2000 | J Appl Phys2000，87，： | 1 |
| 16 | Control system of a mini hydraulic press for evaluating springback in sheet metal forming显示文摘 | Sun P Gracio J J Ferreira J A | 2006 | Journal of Materials Processing Technology2006，176，1： | 1 |
| 17 | Diamond Growth by Chemical Vapour Deposition显示文摘 | Gracio J J Fan Q H Madaleno J C | 2010 | Journal of Physics D: Applied Phys/cs2010，43，37： | 1 |
| 18 | Close loop control of a hydraulic press for springback analysis显示文摘 | Ferreira J A Sun P Gracio J J | 2006 | Journal of Materials Processing Technology2006，177，1： | 1 |
| 19 | Diamond coatings on 3D structured steel显示文摘 | NETO V F VAZ R ALI N OLIVEIRA M S A GRACIO J | 2008 | Diamond and Related Materials2008，17，710： | 1 |
| 20 | Free-standing diamond film preparation using copper substrate 显示文摘 | FAN Q H GRACIO J PEREIRA E | 1997 | Diamond and Related Materials1997，6，： | 1 |
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