{"title":"硼对TiAl/Ti3Al的影响","authors":"C.R. Feng, D.J. Michel, C.R. Crowe","doi":"10.1016/0036-9748(89)90347-5","DOIUrl":null,"url":null,"abstract":"<div><p>The TiAl/Ti<sub>3</sub>Al interfacial misfit dislocations structures were investigated by TEM in Ti-45Al alloy and Ti-45Al/TiB<sub>2</sub> composite. For TiAl with c/a = 1.02, only a single set of misfit dislocation arrays are crystallographically possible; these were observed in Ti-45Al alloy. However, the observation of three sets of misfit dislocation arrays in the Ti-45Al/TiB<sub>2</sub> composite suggests that the occupation of octahedral sites in the TiAl structure by excess boron was responsible for a decrease in the c/a ratio leading to an increased fcc character of the TiAl at the TiAl/Ti<sub>3</sub>Al interface.</p></div>","PeriodicalId":21604,"journal":{"name":"Scripta Metallurgica","volume":"23 10","pages":"Pages 1707-1711"},"PeriodicalIF":0.0000,"publicationDate":"1989-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0036-9748(89)90347-5","citationCount":"19","resultStr":"{\"title\":\"The effects of boron in TiAl/Ti3Al\",\"authors\":\"C.R. Feng, D.J. Michel, C.R. Crowe\",\"doi\":\"10.1016/0036-9748(89)90347-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The TiAl/Ti<sub>3</sub>Al interfacial misfit dislocations structures were investigated by TEM in Ti-45Al alloy and Ti-45Al/TiB<sub>2</sub> composite. For TiAl with c/a = 1.02, only a single set of misfit dislocation arrays are crystallographically possible; these were observed in Ti-45Al alloy. However, the observation of three sets of misfit dislocation arrays in the Ti-45Al/TiB<sub>2</sub> composite suggests that the occupation of octahedral sites in the TiAl structure by excess boron was responsible for a decrease in the c/a ratio leading to an increased fcc character of the TiAl at the TiAl/Ti<sub>3</sub>Al interface.</p></div>\",\"PeriodicalId\":21604,\"journal\":{\"name\":\"Scripta Metallurgica\",\"volume\":\"23 10\",\"pages\":\"Pages 1707-1711\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1989-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0036-9748(89)90347-5\",\"citationCount\":\"19\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Scripta Metallurgica\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0036974889903475\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Scripta Metallurgica","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0036974889903475","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
The TiAl/Ti3Al interfacial misfit dislocations structures were investigated by TEM in Ti-45Al alloy and Ti-45Al/TiB2 composite. For TiAl with c/a = 1.02, only a single set of misfit dislocation arrays are crystallographically possible; these were observed in Ti-45Al alloy. However, the observation of three sets of misfit dislocation arrays in the Ti-45Al/TiB2 composite suggests that the occupation of octahedral sites in the TiAl structure by excess boron was responsible for a decrease in the c/a ratio leading to an increased fcc character of the TiAl at the TiAl/Ti3Al interface.
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