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เปิดเมื่อ28/01/2015
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สมัครสมาชิก | ลืมรหัสผ่าน

ทังสเตนคาร์ไบด์

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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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neha singh [122.163.80.xxx] เมื่อ 17/06/2021 18:41
288
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neha singh
 
neha singh [122.163.80.xxx] เมื่อ 17/06/2021 18:53
289
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how long does weed stay in the system after o
how long does weed stay in the system after one hit
I really enjoyed this blog site it’s very impressive.
 
ลิงค์ที่เกี่ยวข้อง : https://cannabismo.org/long-marijuana-high-last/
how long does weed stay in the system after o [49.148.213.xxx] เมื่อ 18/06/2021 15:22
290
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dehradun escort
Kanpur Escort Agra Escort Prayagraj Escort Moradabad Escort Lucknow Escort Ghaziabad Escort Azamgarh Escort Varanasi Escort Mathura Escort MEERUT ESCORT RAEBARELI ESCORT ETAWAH ESCORT ALIGARH ESCORT Indore Escort Bhopal Escort Jabalpur Escort Rewa Escort Katni Escort Ratlam Escort Ujjain Escort Gwalior Escort Jaipur Escort Jodhpur Escort Sikar Escort Ajmer Escort Alwar Escort Jaisalmer Escort Bikaner Escort Mount Abu Escort MURSHIDABAD ESCORT DAKSHIN DINAJPUR ESCORT HOOGHLY ESCORT KOLKATA ESCORT DARJEELING ESCORT HOWRAH ESCORT NORTH 24 PARGANAS ESCORT SOUTH 24 PARGANAS ESCORT DEHRADUN ESCORT HARIDWAR ESCORT NAINITAL ESCORT ALMORA ESCORT RUDRAPRAYAG ESCORT UTTARKASHI ESCORT PITHORAGARH ESCORT CHAMOLI ESCORT MEDAK ESCORT JAGTIAL ESCORT ADILABAD ESCORT HYDERABAD ESCORT RANGA REDDY ESCORT NIZAMABAD ESCORT WANAPARTHY ESCORT SIDDIPET ESCORT CHENNAI ESCORT COIMBATORE ESCORT KANCHIPURAM ESCORT MADURAI ESCORT RAMANATHAPURAM ESCORT SALEM ESCORT TIRUVALLUR ESCORT VELLORE ESCORT AMRITSAR ESCORT 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ESCORT JAGTIAL ESCORT ADILABAD ESCORT HYDERABAD ESCORT RANGA REDDY ESCORT NIZAMABAD ESCORT WANAPARTHY ESCORT SIDDIPET ESCORT CHENNAI ESCORT COIMBATORE ESCORT KANCHIPURAM ESCORT MADURAI ESCORT RAMANATHAPURAM ESCORT SALEM ESCORT TIRUVALLUR ESCORT VELLORE ESCORT AMRITSAR ESCORT BATHINDA ESCORT FARIDKOT ESCORT FAZILKA ESCORT JALANDHAR ESCORT LUDHIANA ESCORT MOHALI ESCORT PATIALA ESCORT GANJAM ESCORT PURI ESCORT BHADRAK ESCORT CUTTACK ESCORT KHORDHA ESCORT MAYURBHANJ ESCORT JAJPUR ESCORT GAJAPATI ESCORT AIZAWL ESCORT CHAMPHAI ESCORT HNAHTHIAL ESCORT KOLASIB ESCORT KHAWZAWL ESCORT LAWNGTLAI ESCORT LUNGLEI ESCORT MAMIT ESCORT SAIHA ESCORT SERCHHIP ESCORT SAITUAL ESCORT MON ESCORT DIMAPUR ESCORT KIPHIRE ESCORT KOHIMA ESCORT LONGLENG ESCORT MOKOKCHUNG ESCORT NOKLAK ESCORT PEREN ESCORT PHEK ESCORT TUENSANG ESCORT WOKHA ESCORT ZUNHEBOTO ESCORT AHMEDNAGAR ESCORT AURANGABAD ESCORT JALGAON ESCORT KOLHAPUR ESCORT LATUR ESCORT NAGPUR ESCORT NANDED ESCORT NASHIK ESCORT OSMANABAD ESCORT PUNE ESCORT 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ลิงค์ที่เกี่ยวข้อง : https://www.udaipurcallgirls.in
dehradun escort [183.83.43.xxx] เมื่อ 18/06/2021 18:32
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