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สมัครสมาชิก | ลืมรหัสผ่าน

ทังสเตนคาร์ไบด์

อ่าน 1968272 | ตอบ 12788
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.
ความคิดเห็น :
12768
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genibig gdgf
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genibig gdgf [223.233.67.xxx] เมื่อ 30/08/2026 18:42
12769
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Wilson

A construction expert witness may provide independent technical opinions on construction-related matters. Strong industry knowledge and clear communication are valuable skills for this role. The College of Contract Management offers professional expert witness training.

 
 
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Wilson [112.78.162.xxx] เมื่อ 31/08/2026 17:56
12770
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jawa [117.193.179.xxx] เมื่อ 31/08/2026 18:41
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jawa
 
jawa [117.193.179.xxx] เมื่อ 31/08/2026 18:43
12772
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genibig gdgf
Koinly Login is the starting point for accessing your Koinly account and managing cryptocurrency transaction records, portfolio information, and tax-related reports. Whether you actively trade digital assets or simply want to keep your crypto records organized, logging into Koinly provides access to the platform's dashboard and available tools. Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login
 
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genibig gdgf [223.233.68.xxx] เมื่อ 31/08/2026 18:48
12773
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genibig gdgf
Koinly Login is the starting point for accessing your Koinly account and managing cryptocurrency transaction records, portfolio information, and tax-related reports. Whether you actively trade digital assets or simply want to keep your crypto records organized, logging into Koinly provides access to the platform's dashboard and available tools. Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login | Koinly Login
 
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genibig gdgf [223.233.68.xxx] เมื่อ 31/08/2026 18:48
12774
อ้างอิง

Lori
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Lori [172.245.103.xxx] เมื่อ 31/08/2026 22:17
12775
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Mindy
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Mindy [172.245.103.xxx] เมื่อ 1/09/2026 00:07
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ssss aaaa [185.136.159.xxx] เมื่อ 1/09/2026 11:56
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Arlette
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Arlette [109.248.12.xxx] เมื่อ 1/09/2026 17:03
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