Ma Zongyi, Bi Jing, Lü Yuxiong, Luo Ming, Gao Yinxuan. Effect of Al3 Ti Particle in-situ Formed on the Properties and Microstructure of SiCp/2024Al Composite[J]. Journal of Materials Engineering, 1993, 0(11): 1-3.
The SCP/2O24Al composites containing Ti were fabricated by powder metallurgy technique.It wasindicated that part of Ti reacted with Al to form Al3Ti under the fabrication condition of composites.Thecoarse Al3Ti/Ti particle decreases the room-temperature tensile strength and ductility of the composites,but can increase the yield strength and elastic modulus.
Jiang Juezhen, Wang Hezhong, Ren Jishou, Wang qinghai. Investigation of a Mid-temperature-cure Resin System[J]. Journal of Materials Engineering, 1993, 0(11): 4-6.
A mid-temperature-cure resin system (3251) composed of an accelerator D substituted dicyardiamideand CTBN-DGEBA is invented.It is found that there is a good compatibility in acetone between the components in 3251 system,so the resin can be benefit to prepare a prepreg with high qualities and requirementsof curing at a moderate temperature.The composite based on the matrix and E glass cloth has a more advenced mechanical characteristics and ideal wet-heat-age properties.
Zhang Min. Research of the Structures, the Cure Mechanism and the Properties of BMI Resin[J]. Journal of Materials Engineering, 1993, 0(11): 7-11.
In thee Paper, the cure mechanism of BMI resin System is Studied by Fourier Transform Infrared Spec-troscopy(FT-IR) and Dynamic Mechanical Analyser (DMA).It is found that high temperature isfavourable to the production of -CH2-,but not φ-O-C,and the cure degree is increased effectivelywith the raising cure temperature,no with prolonging cure time.The mechanical results of this compositecoincide with the viewpoint of above.
Shi Tuo. Heat-Decomposition and Life Forecast of PC/CaCO3/NBR Composite[J]. Journal of Materials Engineering, 1993, 0(11): 14-15,46.
The appliance dynamic Thermogravimetry (TG) and Differential Scanning Calorimetry (DSC)memthod, the heat decomposition reaction dynamics of PC/CaCO3/NBR composite systems have been usingthe dynamics techniques of TG and DSC in the air.The overall apporent perameter for the hat-decomposition has been found for the PC/CaCO3/NBR composite systems.The paper forecast the heat-resisting lifeof PC/CaCO3/NBR composite systems.
Wang Xuecheng, Chai Huifen, Wang Xiaotian. Study and Development on the Structural Materials of Molybdenum Disilicide (MoSi2) for High Temperature Applications[J]. Journal of Materials Engineering, 1993, 0(11): 16-18,22.
This paper has introduced the properties of molybdenum disilicide (MoSi2)in detail,and some research progressos in developing new structural materials of MoSi2 for high temperature performance havebeen presented.
In the present paper,both the process and new grain boundary of austenite recrystallized of 300M ultra high strength steel have been Oserved insitu by means of high-temperature metalloscope and TEM.The.results show that the new grain boundary of austenite recrystallized crosses the lath structure and consistedof high density dislocation.The austenite recrystallization mechanism is suggested in terms of experimental observations mentioned above.
Yan Hong. The Properties of Electroless Nickels and Their Application in Aircraft Field[J]. Journal of Materials Engineering, 1993, 0(11): 23-25.
The types and properties of electroless nickel plating are studies in this paper.It is indicated that electroless nickel plating is getting more and more widely used in the aircraft industry.
Jiang Yijun, Li Yong, Zhai Quansheng, Chen Xiangbao. Large-area Damage Repair of Tu-154 Composite Material Radome[J]. Journal of Materials Engineering, 1993, 0(11): 26-27,42.
This paper describes the large-area repair of Tu-154 composite material radome.The repaired radomemeets the needs of the strength、aerodynamic and dielectric requrements by using proper repair process.
Zhang Baocheng, Zhu Liqun. A New Zn-Ti Alloys Coating of High-Strength Steel[J]. Journal of Materials Engineering, 1993, 0(11): 28-31.
A new Zn-Ti alloys coating was obtained The data from salt solution immersion,neutral salt spraytest and outdoor exposure test are reported.The results for that the cprrosion resistance of the coating isevidently superior to that of Zn coating and has only sligh differences with that of cd coating.Under thecondition of 75%σbH,notched bars can endure for over 200h before fracture.The Standard of hydrogenbrittleness was satisfied.The new coating is applicable to the protection of high-strength steel.
Liu Changming, Li Yumei. Method for Spectrum Analysis of Zinc-Base Alloys in ZZnAl4-1 Mg, Fe, Pb, Sn[J]. Journal of Materials Engineering, 1993, 0(11): 32-34,31.
In this way,the sample should be dissolved in dilute nitric acid,evaporated to dryness,burnt into nitrate oxide with the temperature raised to 400℃,and ground to powder.Then the sample should be evokedby arc light to be analyzed with spectroscopic pure carbon as buffer.The accuracy can be within Mg4.4%, Fe 7.4%, Pb 2.7%, Sn 3.1%. It has already been used in production.
Li Jichen, Li Wei. Direct Spectrophotometric Determination of the Total Amount of Cerium Rare Earths in Aluminium Alloys 2024 Using P-Aminohippuric Acid Chlorophosphonazo[J]. Journal of Materials Engineering, 1993, 0(11): 37-39.
P-Aminohippuric Acid chlorophosphonazo red in acidic medium and reacts with RE to form blue-violet complexs,which gives a high absorption at 680nm.This proposed method has high selectivity,stability and sensitiveness and has been successfully applied to determine the Total RE in 2024 Aluminium alloyswith satisfactory results.
Dai Yongyao. Carbon-Carbon Composites and Their Applied Prospects in Aviation Industries[J]. Journal of Materials Engineering, 1993, 0(11): 43-46.
This Paper discusses the present situation of carbon-carbon composites,the development of technologiesof carbon-carbon,the measures of resistant to oxidation and their applied prospects in aviation industries.
