W、Ni、Fe粉末按照91.16W 6.56Ni 2.26Fe和95W5Ni的成分配比进行了机械合金化(MA),通过调整球磨转速、球磨时间等工艺参数研究了其对粉末结构的影响.并对机械合金化粉末的物相、合金化特性、晶粒尺寸、点阵畸变及粉末形貌和颗粒度作了测定和分析讨论.机械合金化使晶粒细化并产生孪晶和位错,有利于原子扩散形成过饱和固溶体和非晶;高的球磨能有利于形成非晶相、晶粒细化和点阵畸变,350 r/min球磨20h后晶粒尺寸可达25nm;输入的球磨能不同,粉末粒度的变化路径不同,但都会经历长大,变小和稳定三个不同阶段.
参考文献
| [1] | Lenel F V.Powder Metallurgy: Principles and Applications[M].MPIF,Princeton,NJ,1980 |
| [2] | Rabin B H;German RM .Microstructure effects on tensile properties of tungsten -nickel-iron composites[J].Metallurgical and Materials Transactions,1988,19(06):1523-1532. |
| [3] | Bose A;German R M .Microstructural refinement of W-Ni-Fe heavy alloys by alloying additons[J].Metallurgical and Materials Transactions,1988,19:3100-3103. |
| [4] | German R M;Bose A;Mani S S .Sinter time and atmosphere influence on the microstructure and mechanical properties of tungsten heavy alloys[J].Metallurgical and Materials Transactions,1992,23(01):211-219. |
| [5] | Song Heung-sub;Noh Joon-Woong;Baek Woon-Hyung et al.Undulation of W/matrix interface by resintering of cyclically heat-treated W-Ni-Fe heavy alloys[J].Journal of Materials Processing Technology,1997,63:618-623. |
| [6] | He Z.W-Ni-Fe non-crystalline alloys: Thermal stability and consolidation behavior[M].Michigan Technological University,2001 |
| [7] | Ryu H J et al.Microstructure and mechanical properties of mechanically alloyed and solid-state sintered tungsten heavy alloys[J].Material Science and Engineering,2001,291:91-96. |
| [8] | He Z.;Courtney TH. .Crystallization and thermal stability of mechanically alloyed W-Ni-Fe noncrystalline materials[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2001(1/2):166-173. |
| [9] | Lonnberg B .Characterization of milled Si3N4[J].Journal of Materials Science,1994,29:3224-3230. |
| [10] | HALL W H.X-ray line broadening in metals[J].Proceedings of the Physical Society,1949(62):741-743. |
| [11] | ANING A O;Wang Z;Courtney T H .Tungsten solution kinetics and amorphization of nickel in mechanically alloyed Ni-W alloys[J].ACTA METALLURGICA ET MATERIALIA,1993,41(01):165-174. |
| [12] | Davis R M;Mcdermott B;Koch C C .Mechanical alloying of brittle materials[J].Metallurgical and Materials Transactions,1988,19(12):2867-2874. |
| [13] | Papirer E et al.The influence of grinding on the surface properties of α-aluminas[J].Journal of Colloid and Interface Science,1993,156:104-108. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%