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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.
ความคิดเห็น :
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Do you wish to spend time with a kind and lovely girl? Are you missing your loved ones and need some solace? In that case, Call Girl in Gurgaon is ready to assist you in achieving your unmet aspirations….
Exists Gurugram for you? Working nonstop with no sources of leisure or recreation? Then, pay a call girl service in Gurgaon to be by your side constantly. Think about having a flatmate while you are away from home. How fantastic would that be!
How may the Gurgaon call girls be of use to you? To care for males like you, they have received specialised training. They are aware of several techniques for fostering genuine happiness and camaraderie. Call girls in Gurgaon are knowledgeable and polite, so they can assist you in having fun as you see fit.
 
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  • It goes without saying that a man who is always striving for his improvement would experience loneliness when away from his home and close friends. As a result, Call girls in Gurgaon may accompany you constantly, ensuring that you never experience loneliness again.
  • Although most people like spending time in nicer settings, having someone to keep us organised makes the experience much more stimulating. As a result, if you happen to be in Gurugram, our escorts will be there to meet you, and the two of you may spend some time together having fun at your favourite joint location.
  • Missing your family and close friends so much when away from home and remaining alone might be upsetting at times. Therefore, Escorts in Gurgaon are always there to assist you in order to reduce the level of depression. They will continue to hang out with you and have fun so you may recover your spirits.
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·         Every male requires a feminine touch. But if he is travelling for work, it might not be feasible. Therefore, Escorts in Gurgaon are prepared to visit your area to satisfy his wants and provide physical relaxation. Together, you may have a wonderful time and rediscover your sense of relaxation.

 

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Kirti Jaiswal [27.7.227.xxx] เมื่อ 26/05/2023 18:24
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ไม่ว่าคุณจะอ่านเจอเรื่องราว ข้อมูลต่างๆ เกี่ยวกับเกมสล็อตน่าเล่นน่าลงทุนในปี 2022 มาจากที่ไหนก็ตาม คุณจะต้องลืมมันอย่างแน่นอน เราขอนำเสนอสุดยอดค่ายเกมที่น่าสนใจและสามารถทำกำไรได้อย่างแน่นอนในต้นปีนี้กับค่ายเกมแรก ทดลองเล่นสล็อตฟรี รับโบนัสฟรีมากมายกว่า 5 โปร ท่านสามารถเลือกได้ว่าจะรับโปรใดก็ได้ มาพร้อมกับเกมใหม่ระบบใหม่ของเรา ด้วยระบบที่ไม่ว่าจะเป็นตัวเกมหรือกราฟฟิกของระบบ เสียงดนตรีประกอบ ทำให้ผู้ตื่นตาตื่นใจไปพร้อมกับเราใหม่ของเรา
 
pgslot [203.80.167.xxx] เมื่อ 26/05/2023 19:52
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