M. M. Prokopiv, O. V. Kharchenko, I. V. Zap, I. D. Gnylycya
{"title":"利用火花等离子烧结技术在高达 800 兆帕的压力下制造工具级金属陶瓷 Cr2O3-22Cr","authors":"M. M. Prokopiv, O. V. Kharchenko, I. V. Zap, I. D. Gnylycya","doi":"10.3103/S1063457623060084","DOIUrl":null,"url":null,"abstract":"<p>The study reveals that the structure of Cr<sub>2</sub>O<sub>3</sub>–22 wt % Cr cermet, obtained from a mixture of chromium oxide and chromium by spark plasma sintering at a temperature of 1520°C and a pressure range of 40–300 MPa, consists of a chromium oxide matrix with globular 0.5- to 20-μm Cr inclusions, comparable in size to the particles of the initial mixture. At pressures ranging from 300 to 800 MPa, elongated inclusions appear in the structure, the concentration of which increases with the rise in pressure during spark plasma sintering, leading to a decrease in globular grain size. The cermet exhibits maximum Vickers hardness and crack resistance values, determined by the Palmqvist method at 20.2 GPa and 7.6 MPa m<sup>1/2</sup>, respectively. Its stability under intermittent dry cutting with 9Kh12F steel (HRC 58–60) is comparable to ceramics based on Al<sub>2</sub>O<sub>3</sub>–TiC from Sandvik Coromant (Sweden).</p>","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"45 6","pages":"477 - 480"},"PeriodicalIF":1.2000,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Manufacturing Tool-Grade Cermet Cr2O3–22Cr by Spark Plasma Sintering at Pressures up to 800 MPa\",\"authors\":\"M. M. Prokopiv, O. V. Kharchenko, I. V. Zap, I. D. Gnylycya\",\"doi\":\"10.3103/S1063457623060084\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The study reveals that the structure of Cr<sub>2</sub>O<sub>3</sub>–22 wt % Cr cermet, obtained from a mixture of chromium oxide and chromium by spark plasma sintering at a temperature of 1520°C and a pressure range of 40–300 MPa, consists of a chromium oxide matrix with globular 0.5- to 20-μm Cr inclusions, comparable in size to the particles of the initial mixture. At pressures ranging from 300 to 800 MPa, elongated inclusions appear in the structure, the concentration of which increases with the rise in pressure during spark plasma sintering, leading to a decrease in globular grain size. The cermet exhibits maximum Vickers hardness and crack resistance values, determined by the Palmqvist method at 20.2 GPa and 7.6 MPa m<sup>1/2</sup>, respectively. Its stability under intermittent dry cutting with 9Kh12F steel (HRC 58–60) is comparable to ceramics based on Al<sub>2</sub>O<sub>3</sub>–TiC from Sandvik Coromant (Sweden).</p>\",\"PeriodicalId\":670,\"journal\":{\"name\":\"Journal of Superhard Materials\",\"volume\":\"45 6\",\"pages\":\"477 - 480\"},\"PeriodicalIF\":1.2000,\"publicationDate\":\"2024-01-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Superhard Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.3103/S1063457623060084\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Superhard Materials","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.3103/S1063457623060084","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Manufacturing Tool-Grade Cermet Cr2O3–22Cr by Spark Plasma Sintering at Pressures up to 800 MPa
The study reveals that the structure of Cr2O3–22 wt % Cr cermet, obtained from a mixture of chromium oxide and chromium by spark plasma sintering at a temperature of 1520°C and a pressure range of 40–300 MPa, consists of a chromium oxide matrix with globular 0.5- to 20-μm Cr inclusions, comparable in size to the particles of the initial mixture. At pressures ranging from 300 to 800 MPa, elongated inclusions appear in the structure, the concentration of which increases with the rise in pressure during spark plasma sintering, leading to a decrease in globular grain size. The cermet exhibits maximum Vickers hardness and crack resistance values, determined by the Palmqvist method at 20.2 GPa and 7.6 MPa m1/2, respectively. Its stability under intermittent dry cutting with 9Kh12F steel (HRC 58–60) is comparable to ceramics based on Al2O3–TiC from Sandvik Coromant (Sweden).
期刊介绍：
Journal of Superhard Materials presents up-to-date results of basic and applied research on production, properties, and applications of superhard materials and related tools. It publishes the results of fundamental research on physicochemical processes of forming and growth of single-crystal, polycrystalline, and dispersed materials, diamond and diamond-like films; developments of methods for spontaneous and controlled synthesis of superhard materials and methods for static, explosive and epitaxial synthesis. The focus of the journal is large single crystals of synthetic diamonds; elite grinding powders and micron powders of synthetic diamonds and cubic boron nitride; polycrystalline and composite superhard materials based on diamond and cubic boron nitride; diamond and carbide tools for highly efficient metal-working, boring, stone-working, coal mining and geological exploration; articles of ceramic; polishing pastes for high-precision optics; precision lathes for diamond turning; technologies of precise machining of metals, glass, and ceramics. The journal covers all fundamental and technological aspects of synthesis, characterization, properties, devices and applications of these materials. The journal welcomes manuscripts from all countries in the English language.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
