کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7887038 | 1509788 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Micromorphology and structure of pyrolytic boron nitride synthesized by chemical vapor deposition from borazine
ترجمه فارسی عنوان
میکرومورفولوژی و ساختار نیترید بور بر پایه ترکیبات شیمیایی بخار از بورازین
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کلمات کلیدی
رسوبات بخار شیمیایی، نیترید بور پریلیتیک، مرفولوژی، ساختار، مکانیسم،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
Pyrolytic boron nitride (PBN) plates were synthesized by chemical vapor deposition (CVD) with temperatures of 900-1900â¯Â°C and total pressures of 50-1000â¯Pa on graphite by using borazine as the precursor. The effects of temperature and pressure on the micromorphology and crystal structure of the PBN were investigated. The as-deposited PBN possessed three typical types of micromorphologies depending on the deposition condition. PBN with dense and laminated structure (Type A) were deposited at temperatures of 1150-1900â¯Â°C with relative low pressures of 50-200â¯Pa, and PBN with porous and isotropic structure (Type C) was deposited at temperatures above 1100â¯Â°C with higher pressures above 250â¯Pa. PBN with dense and glass-like fracture structure (Type B) was obtained at the other range of the deposition condition. The interlayer spacing (d(002)) and the preferred orientation (PO) of the crystallite were calculated by using XRD data of the PBN plates. The degree of the preferred orientation tended to be higher with the increase of temperature and decrease of pressure, and higher temperature led to smaller value of d(002). The crystal growth mechanism of the three types of PBN was discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 10, July 2018, Pages 11424-11430
Journal: Ceramics International - Volume 44, Issue 10, July 2018, Pages 11424-11430
نویسندگان
Shitao Gao, Bin Li, Duan Li, Changrui Zhang, Rongjun Liu, Siqing Wang,