ag88|环亚

                          
                          

                               
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                              Nanocs polymer-based nanodiamond coating and applications

                              Nanocs innovates a unique technology to produce the hard carbon film consisted of nanocrystalline diamonds in amorphous carbon matrix from a special diamond-like polymer precursor. The polymer precursor is easily soluble in organic solvents, and can be applied to various substrates by spinning, dipping, draining, brushing or printing. The films can be coated on complex shape with large area both inside and outside simultaneously. By a heat-treatment, the polymer precursor can be converted into hard carbon film which has excellent mechanical and wear properties. Currently, our hard carbon films have been used as graphite coating for the heat-corrosion and wear-resistant films, such as moulds, electrodes, extruders and cylinders, as ceramic coating to enhance surface hardness and wear resistance for tools application in milling, cutting, boring; bearings, dice, rollers.

                              Comparison of the mechanical and wear properties of graphite, normal CVD hard-carbon on graphite and Nanocs hard-carbon on graphite.

                              Materials

                              Hardness (Gpa)

                              Young’s Modulus 

                              Frication coefficient

                              Wear Rate (m3N-1m-1)

                              Graphite

                              0.2

                              8 GPa

                              0.22-0.28

                              >10-5

                              CVDHC-G

                              1-3

                              15-20 GPa

                              0.14-0.21

                              >10-10

                              NanocsHC-G

                              5-10

                              40-100 GPa

                              0.12-0.19

                              10-16-10-15

                               

                              The hardness of the Nanocs hard carbon film coated on graphite can be enhanced 20-50 times compared to graphite, 2-5 times compared to normal CVD hard carbon film coated on graphite. The wear resistance property and life time of the Nanocs hard carbon film coated on graphite can be enhanced significantly (above 100 times), comparing with graphite or normal CVD hard carbon film coated on graphite.

                              Nanocs polymer-based nanodiamond coating

                              Structure and Morphology:

                              The hard carbon film converted from polymer precursor consists of diamond crystals and amorphous carbon matrix. 

                              Mechanical property:

                              The hardness and Young's modulus of the hard carbon films were determined by a Nanoindenter using continuous stiffness measurement. The hardness and Young’s modulus of Nanocs hard carbon film on graphite is about 9 and 120 Gpa, respectively, while the hardness and Young’s modulus of graphite substrate is about 0.25 and 3 GPa. For CVD hard carbon film on graphite, the hardness and Young’s modulus is 2.5 and 30 Gpa, respectively. Nanocs hard carbon film coated graphite is much higher than that of the graphite substrate or normal CVD hard carbon coated graphite.

                              The hardness and Young’s modulus of Nanocs hard carbon film on Si3N4 ceramic substrate is about 28 and 340 Gpa, whilst the hardness and Young’s modulus of Si3N4 ceramic substrate is about 9 and 240 Gpa, respectively. Clearly, Nanocs hard carbon coating can enhance the surface hardness of the ceramic significantly.

                              Contact: info@www.zlyzxp1128.cn for more information!

                               
                               
                               
                              Besides diamond film, Nanocs also provides various nano & micro diamond powders and high purity diamond wafers.

                              2004©Nanocs Inc. All Rights Reserved

                                                      
                                                      

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