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Composite ceramic composition and method of forming same

A technology of composite ceramics and compositions, applied in the direction of carbon-silicon compound conductors, chemical instruments and methods, metal/alloy conductors, etc., can solve the problems of poor wear resistance, difficult and expensive manufacture of hard materials, etc., and achieve high chemical stability Effect

Active Publication Date: 2021-04-06
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These hard materials are difficult and expensive to manufacture and are not usually used in bulk
Boron carbide, tungsten carbide and titanium carbide are other hard materials that are easier to form but less wear resistant than CBN and diamond

Method used

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  • Composite ceramic composition and method of forming same
  • Composite ceramic composition and method of forming same
  • Composite ceramic composition and method of forming same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0052] figure 1 The three-phase diagram shown shows the molar ratios of carbon, boron, and transition metal (TM) contained in Examples 1-5 of the present disclosure. Tables V, W and X shown below refer to the batch components used in Examples 1-5. Specifically, Table V shows figure 1 Mole percents of components of each example are indicated. Table W compares the mole percentages of transition metals to the mole percentages of boron and carbon contained in each example. Table X presents the weight %, volume % and mole % of the batch components (powders) used to form Examples 1-5.

[0053] Table V

[0054]

[0055]

[0056] Form W

[0057]

[0058] Table X

[0059]

[0060]

[0061] for figure 1 and Tables V-X, Example 1 is a prior art chemical reported by Telle et al., although the processing method is different from that reported and similar to that disclosed for other examples.

Embodiment 2

[0062] Example 2 has the same boron:TM ratio as Example 1, but with carbon addition ( figure 1). The boron precursor in Example 1 was amorphous boron powder, and the boron and carbon added in Example 2 were in the form of boron carbide.

Embodiment 3

[0063] Example 3 has the same boron:carbon ratio as Examples 1 and 2, but a different boron:TM ratio. Example 4 has similar boron:TM and boron:carbon ratios as Examples 3 and 5, but with the addition of a IVB transition metal (zirconium) instead of the VIB transition metal (chromium) used in Examples 1-3.

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Abstract

A composite ceramic composition comprising a boron carbide phase and a method for forming the same. The composite ceramic composition includes a tungsten boride phase and a transition metal boride phase. The composite ceramic composition may also include carbon disposed in solid solution having at least a tungsten boride phase and a transition metal boride phase. The transition metal boride phase may contain a boride of at least one metal selected from Cr, Nb, and Zr.

Description

[0001] This application claims priority to U.S. Provisional Patent Application Serial No. 62 / 084,623, filed November 26, 2014, which application is based upon and is hereby incorporated by reference in its entirety. technical field [0002] The present disclosure relates to composite ceramic compositions and ceramic materials made from the compositions and articles made therefrom. The composite ceramic composition includes boron, carbon, and at least one transition metal. The composition may also contain other functional phases, in particular involving phases containing both boron and carbon. [0003] technical background [0004] Diamond and cubic boron nitride (CBN) are the hardest materials with a hardness value exceeding 70GPa Vickers hardness (1kgf load). These hard materials are difficult and expensive to manufacture and are not usually used in bulk form. Boron carbide, tungsten carbide and titanium carbide are other hard materials that are easier to form but less wea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/563C04B35/58
CPCC04B35/563C04B35/58064C04B2235/3813C04B2235/3821C04B35/58C09K5/14H01B1/02H01B1/04C04B35/6261C04B35/6264C04B35/645C04B2235/425C04B2235/602C04B2235/6567C04B2235/6581C04B2235/6586C04B2235/9607
Inventor B·R·康韦J·W·齐默尔曼
Owner CORNING INC