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Non-contact method of characterizing isostatic strength of cellular ceramic articles

A non-contact technology for ceramic products, applied in the field of porous ceramic products, can solve the problems of time-consuming production, slow down, not isostatic strength, etc.

Active Publication Date: 2018-08-31
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, such measurements result in damage or destruction of the ceramic article and are therefore not a preferred method for characterizing isostatic strength, especially in a manufacturing environment
This direct measurement of isostatic strength is also time consuming and can slow down production

Method used

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  • Non-contact method of characterizing isostatic strength of cellular ceramic articles
  • Non-contact method of characterizing isostatic strength of cellular ceramic articles
  • Non-contact method of characterizing isostatic strength of cellular ceramic articles

Examples

Experimental program
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Embodiment

[0085] In one example, isostatic strength SM measurements were made on a test ceramic article formed from cordierite having square cells with a density of 200 cells / inch and a web wall thickness TH of 0.008 inch. The ceramic articles tested had various network defects and cell defects, including broken cells, twisted cells, and missing cell walls, and thus had a range of measured isostatic strengths SM. The isostatic strength SM is measured using conventional equipment. For each test ceramic article, follow the above steps for modeling to obtain the stress concentration factor σ F . The beam elements BE used are rectangular.

[0086] Figure 9 is for the data obtained by modeling and measuring the above test ceramics, 1 / σ F Graph versus measured isostatic strength SM (bar). Solid black circles represent test ceramics with disconnected channels 20, while filled white circles represent test ceramics with severed mesh 18 (ie severed walls 30).

[0087] Based on the followi...

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Abstract

A non-contact method of characterizing the isostatic strength of a ceramic member or article includes capturing a digital image of the ceramic article, and then forming a two-dimensional representation of the ceramic article and the web therein based on the captured digital image. The method also includes performing finite-element analysis on the two-dimensional representation of the ceramic article using a select amount of simulated isostatic pressure to determine a maximum stress value within the two-dimensional representation of the web. The method further includes using the maximum stressvalue to characterize the isostatic strength of the ceramic article.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority to U.S. Provisional Application Serial No. 62 / 279,397, filed January 15, 2016, which is based on the contents of that application and is hereby incorporated by reference in its entirety. technical field [0003] The present disclosure relates to porous ceramic articles, and in particular, to methods of characterizing the isostatic strength of ceramic articles, such as extruded porous ceramic articles. [0004] [ "Isostatic Strength of Extruded Cordierite Ceramic Substrates"], SAE 2004 World Congress and Exhibition, SAE Technical Paper 2004-01-1135, 2004, doi:10.4271 / 2004-01-1135; March 8, 2004 Published. Background technique [0005] Porous ceramic articles are used as particulate filters and catalytic converters in internal combustion engines. The cells may be densely packed to provide a relatively large surface area for the catalytic material to react with the exhaus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06K9/36G06K9/62B23B3/12G06V10/34
CPCG06T7/0004G06T2207/30108G06F2119/18G06F30/23Y02P90/02G06V30/144G06V10/34G06V2201/06B32B3/12G06F2111/10
Inventor S·T·尼科尔森D·J·沃西
Owner CORNING INC