Preparation of diamond/vitrified bond composite sintered by sol-gel method and its performance characterization
Based on the diamond and inorganic sol, sol-gel(S-G) method was used to prepare diamond/vitrified bond composite powder and then the bulk samples were obtained after the powder was pressed and sintered,and the bond composite powder was characterized by XRD, SEM, electronic universal testing machine,...
| Main Authors: | , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Journal of Materials Engineering
2019-12-01
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| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/Y2019/V47/I12/130 |
| Summary: | Based on the diamond and inorganic sol, sol-gel(S-G) method was used to prepare diamond/vitrified bond composite powder and then the bulk samples were obtained after the powder was pressed and sintered,and the bond composite powder was characterized by XRD, SEM, electronic universal testing machine, Rockwell hardness tester, <i>etc</i>. The results show that diamond/vitrified bond composite powder with good uniformity can be prepared by S-G method, and the bending strength, Rockwell hardness, volume density and porosity of samples sintered at 680℃/2h are 58.54MPa,55.8HRB,1.74g/cm<sup>3</sup>and 24.16%, respectively; when these samples were obtained by melting method, the corresponding figures are 51.32MPa, 72.5HRB,1.92g/cm<sup>3</sup>and 21.47%, respectively. Compared to the melting method, the microstructure of grinding disc prepared by S-G method is uniform and high quality is observed on the machined surface of TC4 titanium alloy, whose <i>R</i>a reaches 0.051μm. |
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| ISSN: | 1001-4381 1001-4381 |