The effect of grit depth of cut on the strength of ground advanced structural ceramics /
Experimental research has been conducted into the effect of grit depth of cut on the flexural strength of ground hot pressed silicon nitride (RBSN), reaction bonded silicon nitride (RBSN), and zirconia toughened hot isostatic pressed aluminum oxide (Al2O3) ceramics. Wheel grit size and machine para...
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| Format: | Thesis Book |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1996.
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| Subjects: | |
| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=739668701&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | Experimental research has been conducted into the effect of grit depth of cut on the flexural strength of ground hot pressed silicon nitride (RBSN), reaction bonded silicon nitride (RBSN), and zirconia toughened hot isostatic pressed aluminum oxide (Al2O3) ceramics. Wheel grit size and machine parameters of wheel depth of cut, workspeed, and wheel speed in surface grinding have been investigated. The results indicate that the primary factors which control the strength of ground ceramics are grind direction and the grit depth of cut. A critical grit depth of cut was established for each of the RBSN and RBSN ceramics. The critical depth of cut is defined as the depth of cut at or below which grinding will not incur any strength degradation to the ceramic material.. Results showed that as grit depth of cut increased beyond a value around 0.5 Jim no further strength reduction occurred for the range of grit depth of cut investigated in this research. This suggests that a more aggressive roughing process can be used for ceramic grinding to achieve higher material removal rate without causing greater damage to the material. Results also showed that A1203 was much more sensitive to the grinding surface damage than the other two ceramics. The lapping process was employed to find out the material inherent strength and the depth of grinding damage for the A1203 ceramic. Surface finish results and SEM investigation of ground surfaces for all three ceramics are also reported. |
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| Item Description: | Vita. "Major Subject: Mechanical Engineering". |
| Physical Description: | xi, 79 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilms Inc. |
| Bibliography: | Includes bibliographical references: pages 77-78. |