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 Posted: Sun 14:54, 09 Jan 2011 Post subject: moncler günstig Intermetallic composite reinforce |
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Intermetallic reinforced aluminum alloy composite of in situ reaction
Outside. The edge of the network backbone in the Ni reaction products are also formed solid solution prolonged the edge of the formation of reaction products increased, through the analysis, which is actually the angle of the triangle edge. They are just different section shape Ni network caused. Figure 5 is the reaction product of the scanning electron micrograph, the figure clearly reflects the reaction products and interfacial conditions, using scanning electron spectroscopy stirrup, x-ray diffraction and microhardness of the reaction products of the chemical composition of several of the reaction layer,[link widoczny dla zalogowanych], hardness, and phase composition, test results are listed in Table 4. Table 4, the chemical composition of reaction products. Microhardness and phase Table4Chemicalcomopsitions, microhardnessandphasestructureofreactiveintermetalliccompound the above results, NFRA obtained by solution treatment did IMCFRA, there is enhancement of aluminum alloy, IMCFRA there are several types of intermetallic compounds. 3 discussed in Figure 5, the regional l and region 2 in the form of nickel in the original NFRA network location, the reaction product is clearly not in the original form of nickel network. And b. 6h round from 4NFRA500 ℃ solution to address organizational ThemierostruetureofNFRAa ~ ter500 ℃ solutiontreatment formed in the Al matrix. According to a Ni binary phase diagram of A1 shows, in general, Al-Ni bi-metallic reaction-diffusion process in the formation of the binary intermetallic compounds, because, basically N can not form in the A1 solid solution, and Al can Ni in solid solution in a certain degree of solid solution,[link widoczny dla zalogowanych], therefore, the general reaction-diffusion process of Al to Ni diffusion is mainly the formation of intermetallic compounds should be in the original Ni matrix. The results showed that, IM-CFRA formation. Interface is moving to the A1 matrix (Figure 5). A1 This is a very different form of Ni diffusion. To explain this phenomenon. Have to show the direction of nickel diffusion into the base. A1 mentioned in a binary system Ni Ni-free due to solid solubility in A1,[link widoczny dla zalogowanych], it is impossible to spread to the A1, and now we use the matrix is the AI-Cu-Si alloy, which we believe may be of nickel and the substrate The interactions in the copper. L in Figure 6, regions and regional components analysis showed that 2 of the energy spectrum. Regional l copper was significantly higher than the matrix copper content in the area 2. That segregation in the Ni-Cu first network interface with the matrix, it is possible to outward diffusion of nickel atoms to form such a transition layer l region. So. Copper segregation at the interface between the metal of the table is a physical interface toward the main reason for the growth of the aluminum alloy. Store 5500C, 6h field solution with the scan photo Fig5SEMmierographof500C, 6hso] utiontreatment store deal in Hong Kong early Dan 6 {solid refuse Fig. 6Early-stagemorphologyofsolutio ~ treatment4 Conclusion (1) obtained by low pressure casting process has sickle network reinforced aluminum alloy composites (NFRA). NFRA after solution treatment. Access to the network in situ reaction between the metal of the aluminum alloy fabric reinforced Taiwan (IMCFRA). (2) sickle form a mesh network and the ZL107 alloy compound layer of metal to ask when the form is different from the general reaction-diffusion reaction of Al-Ni diffusion, the formation of intermetallic compounds the interface to move to the aluminum alloy, by experiments and analysis. That this copper and aluminum in the relevant segregation. References 1BakerI, Nagpa] P. LinFetal. TheEffectofGrainsj wake 0ntheYieldStrengthofFeA】 andNiAI. ActRMeta]】. , 1991,[link widoczny dla zalogowanych],39 (7) 1637 ~ 1644.2KungH. RasmussenDR, SassSI. GrainBqundafiesinNi3AII. TheLoeaICompositionalOrder. AetaMeta]】. Mater. . 】 992,[link widoczny dla zalogowanych],40 (1): 81 ~ 973KazuakJShiozawa. Fat ~ uePropertiesofNickelF ∞ mReln ~ orcedA-lumlnumAlloy. 1990.39 (1.】:】 36O ~ 1365 (editor; Wei Liu) 4gF a maggot
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