Synthetic diamond composite tooling material provides step change in aerospace

2015 ◽  
Vol 59 (6) ◽  
pp. 291-293
Author(s):  
Mark Holmes
Keyword(s):  
Synthetic Diamond ◽  
Step Change ◽  
Diamond Composite ◽  
Composite Tooling

scholarly journals Experimental Study of Surface Etching in Synthetic Diamond Microcrystals due to Presence of Cu and Fe at High Pressure

2020 ◽  
pp. 18-21
Author(s):  
I.A. Ishutin ◽  
A.A. Chepurov ◽  
E.I. Zhimulev
Keyword(s):  
Experimental Study ◽  
High Pressure ◽  
Synthetic Diamond ◽  
Close Contact ◽  
High Pressure Cell ◽  
Diamond Composite ◽  
Refractory Oxides ◽  
Diamond Crystals ◽  
Composite Diamond ◽  
High Pressure Apparatus

In the present work, microcrystals of synthetic diamond extracted from a metal-diamond composite were investigated. A composite based on Cu and Fe was obtained by sintering at a pressure of 4 GPa and a temperature of1300 °C. The experiments were carried out using a split-sphere high-pressure apparatus BARS. The high-pressure cell was made of refractory oxides ZrO2, CaO, and MgO using a tubular graphite heater. In the composite, diamond grains were in close contact with neighboring diamonds, and the metal phase filled the interstices. The study of the diamond crystals demonstrated the appearance of newly formed micromorphological structures on the surfaces in the form of numerous cavities of irregular shape on the faces of octahedron, as well as pyramids on the faces of cube, the morphological elements of which follow the contours of the cube face of the diamond. Thus, the results of the work evidence for the processes of etching of the diamond crystals during the experiments, which is associated with the presence of metallic iron in the composite. This type of etching forms a roughly cavernous surface on the diamond crystals, which can be considered as an additional factor for improving the metal-diamond bond in copper-based composites.

Oxide-Diamond Composite Coating Via Sol-Gel Method

1988 ◽  
Vol 121 ◽  
Author(s):  
Azar Nazeri-Eshghi ◽  
J. D. Mackenzie ◽  
J.-M. Yang
Keyword(s):  
Thermal Gradient ◽  
Synthetic Diamond ◽  
Composite Coatings ◽  
Sol Gel ◽  
Soda Lime ◽  
Fused Silica ◽  
Diamond Composite ◽  
Micron Size ◽  
Gel Processing

ABSTRACTUse of micron-size particles of synthetic diamond in oxide matrices prepared by sol-gel processing is explored. Alumina and borosilicate-diamond composite coatings are deposited on soda-lime microscope glass and fused silica substrates using dipping technique and thermophoresis. By varying the thermal gradient between the substrate and the solution, the quality of the films and the concentration of the particles can be controlled.

Reflection electron microscopy of as-grown diamond surfaces

1993 ◽  
Vol 51 ◽  
pp. 1006-1007
Author(s):  
Z.L. Wang ◽  
J. Bentley ◽  
R.E. Clausing ◽  
L. Heatherly ◽  
L.L. Horton
Keyword(s):  
Electron Microscopy ◽  
Synthetic Diamond ◽  
High Energy ◽  
Dark Field ◽  
Reverse Direction ◽  
Diamond Surfaces ◽  
Grain Sizes ◽  
Synthetic Diamonds ◽  
De Beers ◽  
Reflection Electron Microscopy

It has been found that the abrasion of diamond-on-diamond depends on the crystal orientation. For a {100} face, the friction coefficient for sliding along <011> is much higher than that along <001>. For a {111} face, the abrasion along <11> is different from that in the reverse direction <>. To interpret these effects, a microcleavage mechanism was proposed in which the {100} and {111} surfaces were assumed to be composed of square-based pyramids and trigonal protrusions, respectively. Reflection electron microscopy (REM) has been applied to image the microstructures of these diamond surfaces.{111} surfaces of synthetic diamond:The synthetic diamonds used in this study were obtained from the De Beers Company. They are in the as-grown condition with grain sizes of 0.5-1 mm without chemical treatment or mechanical polishing. By selecting a strong reflected beam in the reflection high-energy electron diffraction (RHEED) pattern, the dark-field REM image of the surface is formed (Fig. 1).

A Thick Overgrowth of CVD Synthetic Diamond on a Natural Diamond

2018 ◽  
Vol 36 (2) ◽  
pp. 134-141
Author(s):  
Shi Tang ◽  
Jun Su ◽  
Taijin Lu ◽  
Yongwang Ma ◽  
Jie Ke ◽  
...  
Keyword(s):  
Synthetic Diamond ◽  
Natural Diamond

Identification of a CVD Synthetic Diamond with a 'Tree Ring' Growth Pattern

2015 ◽  
Vol 34 (8) ◽  
pp. 702-710
Author(s):  
Yan Lan ◽  
Rong Liang ◽  
Taijin Lu ◽  
Yong Zhu ◽  
Tianyang Zhang ◽  
...  
Keyword(s):  
Tree Ring ◽  
Growth Pattern ◽  
Synthetic Diamond

SANDMEYER SSC INVAR 36

Alloy Digest ◽  
2012 ◽  
Vol 61 (2) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Coefficient Of Thermal Expansion ◽  
Iron Alloy ◽  
Gas Production ◽  
Liquefied Natural Gas ◽  
Cryogenic Temperatures ◽  
Steel Company ◽  
Nickel Iron ◽  
Composite Tooling ◽  
Nickel Iron Alloy

Abstract SSC Invar 36 was developed for use in applications where dimensional stability is essential. It is a nickel-iron alloy with a very low coefficient of thermal expansion from cryogenic temperatures to 200 deg C (390 deg F). It is utilized in aerospace composite tooling and die applications, as well as laser components, and cryogenic components and piping: liquefied natural gas production, storage, and transportation. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on corrosion resistance as well as forming. Filing Code: Fe-158. Producer or source: Sandmeyer Steel Company. Originally published December 2011, revised February 2012.

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