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สมาชิก

สมัครสมาชิก | ลืมรหัสผ่าน

ทังสเตนคาร์ไบด์

อ่าน 686266 | ตอบ 8347
ทังสเตนคาร์ไบด์
       ทังสเตนคาร์ไบด์ (อังกฤษ: tungsten carbide) มีสูตรเคมีคือ WC ในรูปพื้นฐานจะมีลักษณะเป็นผงสีเทาละเอียด มี 2 โครงสร้างคือแบบหกเหลี่ยม (α-WC) และแบบลูกบาศก์ (β-WC)
 
       ทังสเตนคาร์ไบด์เตรียมได้จากการทำปฏิกิริยาระหว่างทังสเตนกับคาร์บอนที่อุณหภูมิ 1400–2000 °C[3] หรือให้ความร้อนกับทังสเตนไตรออกไซด์และแกรไฟต์โดยตรงที่ 900 °C หรือในแก๊สไฮโดรเจนที่ 670 °C ตามด้วยการคาร์บิวไรเซชันในแก๊สอาร์กอนที่ 1000 °C[4] หรือใช้วิธีการเคลือบด้วยไอเคมี เช่น
  • ทำปฏิกิริยาระหว่างทังสเตนเฮกซะคลอไรด์กับไฮโดรเจนและมีเทนที่อุณหภูมิ 670 °C (1,238 °F)
 WCl6 + H2 + CH4 WC + 6 HCl
  • ทำปฏิกิริยาระหว่างทังสเตนเฮกซะฟลูออไรด์กับไฮโดรเจนและเมทานอลที่อุณหภูมิ 350 °C (662 °F)
                WF6 + 2 H2 + CH3OH → WC + 6 HF + H2O
       ทังสเตนคาร์ไบด์มีจุดหลอมเหลวที่ 2,870 °C (5,200 °F) และจุดเดือดที่ 6,000 °C (10,830 °F) มีความแข็งระดับ 9 ตามมาตราโมสและประมาณ 2600 ตามมาตราวิกเคอส์[5] ทังสเตนคาร์ไบด์มีความแข็งเกร็งมากกว่าเหล็กกล้าประมาณ 2 เท่า มีค่ามอดุลัสของยังประมาณ 530–700 GPa (77,000–102,000 ksi)[2][6][5][7] โมดูลัสของแรงบีบอัด 630–655 GPa และโมดูลัสของแรงเฉือน 274 GPa[8]
 
ด้วยคุณสมบัติความแข็งและทนความร้อนสูง ทังสเตนคาร์ไบด์จึงใช้ทำเป็นเครื่องมือตัดหรือหัวเจาะ ใช้ทำกระสุนเจาะเกราะ เครื่องมือผ่าตัด อุปกรณ์กีฬา เครื่องประดับและอื่น ๆ
 
 
 
 
 
 
 
 
 
 
อ้างอิง
 
  1. Kurlov, p. 22
  2. Blau, Peter J. (2003). Wear of Materials. Elsevier. p. 1345. ISBN 978-0-08-044301-0.
  3. Pierson, Hugh O. (1992). Handbook of Chemical Vapor Deposition (CVD): Principles, Technology, and Applications. William Andrew Inc. ISBN 0-8155-1300-3.
  4. Zhong, Y.; Shaw, L. (2011). 'A study on the synthesis of nanostructured WC–10 wt% Co particles from WO3 , Co3O4 , and graphite'. Journal of Materials Science 46 (19): 6323–6331. Bibcode:2011JMatS..46.6323Z. doi:10.1007/s10853-010-4937-y.
  5. Groover, Mikell P. (2010). Fundamentals of Modern Manufacturing: Materials, Processes, and Systems. John Wiley & Sons. p. 135. ISBN 978-0-470-46700-8.
  6. Kurlov, p. 3
  7. Cardarelli, François (2008). Materials Handbook: A Concise Desktop Reference. Springer Science & Business Media. pp. 640–. ISBN 978-1-84628-669-8.
  8. Kurlov, pp. 30, 135
  9. Sprince, NL.; Chamberlin, RI.; Hales, CA.; Weber, AL.; Kazemi, H. (1984). 'Respiratory disease in tungsten carbide production workers'. Chest 86 (4): 549–557. PMID 6434250. doi:10.1378/chest.86.4.549.
  10. 12th Report on Carcinogens'. National Toxicology Program. http://ntp.niehs.nih.gov/go/roc12. เรียกข้อมูลเมื่อ 2011-06-24.
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Shriram Serenity [172.68.147.xxx] เมื่อ 9/09/2024 15:30
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ลิงค์ที่เกี่ยวข้อง : https://www.shriramserenity.co/
Shriram Serenity [172.68.147.xxx] เมื่อ 9/09/2024 15:30
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ลิงค์ที่เกี่ยวข้อง : https://www.shriramserenity.co/
Shriram Serenity [172.68.147.xxx] เมื่อ 9/09/2024 15:30
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ลิงค์ที่เกี่ยวข้อง : https://www.shriramserenity.co/
Shriram Serenity [172.68.147.xxx] เมื่อ 9/09/2024 15:31
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ลิงค์ที่เกี่ยวข้อง : https://www.shriramserenity.co/
Shriram Serenity [172.68.147.xxx] เมื่อ 9/09/2024 15:31
8282
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ลิงค์ที่เกี่ยวข้อง : https://www.shriramserenity.co/
Shriram Serenity [172.68.147.xxx] เมื่อ 9/09/2024 15:31
8283
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Shriram Serenity
 Shriram Serenity is a premium luxury residential apartment to fulfill your desires for a luxurious and comfortable lifestyle. Situated in the heart of Bangalore's vibrant Yelahanka neighborhood, Shriram Serenity offers a perfect balance between convenience and calmness. The project is located in the primary locality of Rajanukunte, Yelahanka, Bangalore. Shriram Serenity Brochure has all the necessary details related to the project specifications, Master Plan & Floor Plan. All these will be designed and planned by the best architects from the industry to give a better living experience inside the community. The pricing is competitive, ensuring that residents get the best of both worlds – a modern living space in a prime location at a reasonable cost. Offering 2 and 3 Bedroom apartments, Shriram Serenity caters to various family sizes and lifestyle preferences.
 
ลิงค์ที่เกี่ยวข้อง : https://www.shriramserenity.co/
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Brandy
Fantastic website. Lots of useful information here. I am sending it to a few friends ans also sharing in delicious. And obviously, thanks for your sweat!
 
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Brandy [172.71.246.xxx] เมื่อ 11/09/2024 10:36
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