Metal Reinforced Diamond Composite Films

1991 ◽  
Vol 239 ◽  
Author(s):  
C. Tsai ◽  
J. Nelson ◽  
W. Gerberich ◽  
J. Heberlein ◽  
E. Pfender
Keyword(s):  
Diamond Film ◽  
Composite Films ◽  
Diamond Composite ◽  
Step Process ◽  
Metal Binder ◽  
Composite Diamond ◽  
Pin On Disk ◽  
Disk Testing ◽  
And Tungsten

ABSTRACTA three-step process for producing a composite diamond film is presented. Plasma deposited diamonds are reinforced by an electroplated metal binder and the diamonds regrown to produce a continuous, strongly adhered diamond film on molybdenum and tungsten substrates. Microscratching and pin-on-disk testing indicate that the composite films are more adherent than plasma deposited diamonds alone.

Metal reinforced thermal plasma diamond coatings

1992 ◽  
Vol 7 (8) ◽  
pp. 1967-1969 ◽  
Author(s):  
C. Tsai ◽  
J. Nelson ◽  
W.W. Gerberich ◽  
J. Heberlein ◽  
E. Pfender
Keyword(s):  
Thermal Plasma ◽  
Composite Films ◽  
Diamond Coatings ◽  
Plasma Cvd ◽  
Continuous Film ◽  
Step Process ◽  
Composite Diamond ◽  
Rf Thermal Plasma ◽  
Pin On Disk ◽  
Wear Tests

A three-step process to produce wear-resistant, composite diamond coatings is presented. Diamonds are deposited by RF thermal plasma CVD, reinforced by an electroplated metal binder, and regrown to form a continuous film. Microscratching and pin-on-disk wear tests indicate that the three-step composite films are more adherent than plasma deposited diamonds alone.

Fabrication and Cutting Performance of Ultrafine Grain Composite Diamond Coated Drills

2011 ◽  
Vol 188 ◽  
pp. 387-391 ◽  
Author(s):  
Yu Ping Ma ◽  
Gen Fu Yuan ◽  
M. Chen
Keyword(s):  
Diamond Film ◽  
Composite Films ◽  
Aluminum Matrix ◽  
Cutting Performance ◽  
Ultrafine Grain ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Composite Diamond ◽  
Good Adhesive ◽  
Hot Filament

Ultrafine grain composite diamond films are deposited on the WC-Co-based drills using a bias-enhanced hot filament CVD system. During the deposition, the spiral hot filaments and novel two-step pretreatment method for complicated shape tools are adopted. The composite structure is achieved by regulating the concentration of Ar in a mixture of acetone and a hydrogen gases at different stages. The surface morphologies and composition of the first fabricated microcrystalline diamond film and the ultrafine grain diamond film grown later are observed with different techniques. The composite films have the advantages of good adhesive strength and low surface roughness. The cutting performance of the composite diamond-coated drills is investigated by drilling SiC particles reinforced aluminum matrix composites. The drilling life is improved greatly compared with those of uncoated drills and microcrystalline diamond coated drills.

Tribological properties of electroless Ni-P/diamond composite films

2001 ◽  
Vol 36 (11) ◽  
pp. 1889-1902 ◽  
Author(s):  
B. Bozzini ◽  
M. Boniardi ◽  
A. Fanigliulo ◽  
F. Bogani
Keyword(s):  
Tribological Properties ◽  
Composite Films ◽  
Diamond Composite ◽  
Electroless Ni

Diamond/Carbide Nano-Composite Gradient Films: a Route to solve the Adhesion Issues of Diamond Films

2005 ◽  
Vol 890 ◽  
Author(s):  
Thorsten Staedler ◽  
Srikanth Vadali ◽  
Xin Jiang
Keyword(s):  
Diamond Film ◽  
Catalytic Effect ◽  
Soot Formation ◽  
Composite Films ◽  
Diamond Films ◽  
Chemical Vapour ◽  
Compositional Gradient ◽  
Process Step ◽  
Reactive Gases ◽  
Poor Adhesion

ABSTRACTDue to their outstanding mechanical properties diamond films are ideal candidates for many cutting and machining applications. However, industrial applications of these films are limited due to poor adhesion. Two main reasons causing this poor adhesion, which are based on the extrinsic physical and chemical properties of diamond, can be identified: High mechanical stresses induced by a difference of the thermal expansion coefficient between the diamond film and the substrate as well as a catalytic effect in case of metallic substrates containing iron-, cobalt- and nickel that, in combination with a methane atmosphere during deposition, leads to soot formation. One option to overcome these difficulties is to provide an interfacial layer that acts as adhesion layer as well as barrier layer to prevent the catalytic effect of the substrate elements. Even though some successful examples exist, this approach usually requires a time consuming and expensive multi-step process.In this paper, the synthesis of nanocrystalline diamond/carbide composite films with a compositional gradient will be reported. Focusing on the example of diamond/ß-SiC the possibility to create a gradient layer ranging from ß-SiC to diamond in a controlled manner will be shown. The films are prepared by a Microwave Assisted Plasma Chemical Vapour Deposition process (MWCVD) using H2, CH4 and Tetramethylsilane (TMS) as reactive gases. The structure, grain sizes, and volume fractions of the components of these composite films, which consist of a mixture of diamond and carbide phase, can be controlled by adjusting the concentrations of the reactive gases in the gas mixture. This strategy, which handles all depositions in one process step, should allow for an improved diamond film adhesion on tools. The preparation and characterization of the composite films with special emphasize on their mechanical and tribological properties will be discussed and a short outlook on other diamond/carbide systems will be given.

Photo-thermochromic properties of oxygen-containing yttrium hydride and tungsten oxide composite films

2019 ◽  
Vol 200 ◽  
pp. 109930 ◽  
Author(s):  
Qixuan Zhang ◽  
Lingling Xie ◽  
Ying Zhu ◽  
Ying Tao ◽  
Rong Li ◽  
...  
Keyword(s):  
Tungsten Oxide ◽  
Composite Films ◽  
Oxide Composite ◽  
Thermochromic Properties ◽  
Yttrium Hydride ◽  
And Tungsten

Effect of electrodeposition conditions on hardness of Ni–B/diamond composite films

2012 ◽  
Vol 212 ◽  
pp. 180-184 ◽  
Author(s):  
Hitoshi Ogihara ◽  
Mohd Safuan ◽  
Tetsuo Saji
Keyword(s):  
Composite Films ◽  
Diamond Composite
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