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Abstract:The interface microstructure and su perhardness effect of W/Mo nano -mul tilayers have been studied.The W/Mo multilayers were synthesized with magnetron sputtering technique and their microstructure and hardness were characterized by XRD,TEM,HREM,and mi-croindenter,respectively.The results show that the W/Mo multilayers h ave a epitaxially grown mode and got polycrystal superlattices.With the decrease of modulation period of multilayers,the interplanar dista nces of Wand Mo layers are close to eac h other resulting from coherent strain on the interface,which produces an alternating stress field and s trengthens multilayers.

Abstract:發(fā)展正交結(jié)構(gòu)的高壓相β-TiO2可通過高能球磨銳鈦礦TiO2而得到。高能機械球磨減小了顆粒尺寸，球磨40h后，發(fā)現(xiàn)樣品存在2nm～4nm的類點狀顆粒和10nm～35nm的類花瓣狀顆粒。高能球磨改變了銳鈦礦TiO2晶粒的晶格常數(shù)，該晶格畸變現(xiàn)象可能與晶界區(qū)行為相關。紅外吸收峰隨球磨而先“藍移”后“紅移”，該“藍移”與“紅移”與晶格常數(shù)a的變化緊密相關。另外發(fā)現(xiàn)隨著球磨時間增長，TiO2的光催化效果變差。

Abstract:Higher density pulsed current,whic h is considered as an external transient energy and an environmental appl ying work poured into a melt during solidification,is used to refine solidificati on structures of 2024Al -alloy with t he higher melting tem-perature in the present paper.Experimental results show that the solidi fication structure can be remarkabl y refined by the appli-cation of the higher density pulsed c urrent.A primary refinement mechan ism is discussed in detail and some new questions to be solved are also pointed out.

Abstract:The compound fraction of target surface was gotten from the rate equation s of sputtering and the transport equations of reactive particles .All of these equations are expressed by the constructional parameters of the chamber and macroscopic technology parameters.The calculating results from the TiN thin films deposited by reactive sputtering are well fit with the experim ental data.The methodes pro-vided in this paper will be benefit to the implementation of technology op timum as a new engineering methodes.

Abstract:鋁鉛軸承合金帶與具有不同厚度化合物層的熱浸鋁鋼板通過熱軋成功實現(xiàn)復合。復合界面結(jié)構(gòu)分析表明：復合過程中形成兩種界面，熱浸鋁鋼板與鋁鉛合金帶通過化合物界面結(jié)合與缺口界面結(jié)合的機制而復合，闡述了熱浸時間，化合物層厚度，缺口界面分數(shù)之間的關系以及對結(jié)合強度的影響，其中缺口界面分數(shù)是影響結(jié)合強度的主要因素，結(jié)合強度與缺口界面之間呈線性關系，缺口界面分數(shù)隨化合物厚度的增加而增加，超過73μm，轉(zhuǎn)為下降。

Abstract:The effect of stirring strength and t he cooling rate on the rheocast structure of a high chromium white iron were studied.The characteristics of the special low a ngle subgrain boundaries and agglom eration of subgrains were analyzed b y EPMA and EBSD technique.It was found that the cooling rate decid es the ratio of the stress on the dendr ite arm to the diameter of the dendrite root.A proper cooling rate favers the formation of dendrite arm s with big head and thin root and accelerates the breaking of the dendrite a rms.The clustered special subgrain boudaries are the boundaries between the stem and ripened dendr ite arms.The agglomerations of the s ubgrains were indeed evolved from the bent dendrite arms with big h ead and thin root.

Abstract:分別用恒電位階躍法，恒電流放電法和電化學阻抗法研究了不同荷電狀態(tài)和不同溫度下MlNi3.75Co0.65Mn0.4Al0.2貯氫合金電極中氫的擴散系數(shù)。并對各種方法的測試結(jié)果及其在實際應用中的優(yōu)缺點進行了比較和討論。測試結(jié)果表明，室溫下MlN3.75Co0.65Mn0.4Al0.2貯氣合金電極中氫的擴散系數(shù)隨其荷電量的增大而減小，同一荷電狀態(tài)的Ml-Ni3.75Co0.65Mn0.4Al0.2，貯氫合金電極中氫的擴散系數(shù)隨溫度的升高而增大，該電極中氫擴散的活化能為17.9kJ/mol～19.8kJ/mol。

Abstract:The effect of a sputtered NiCrMoNb alloy coating on the oxidation resista nce of the intermetallic compound Ti Al was investigated.The bare TiAl alloy exhibited poor ox idation resistance at 1223K due to th e formation of a TiO 2 -base scale which tended to spall off.The NiCrMoNb alloy coating greatly impr oved the oxidation resistance due to the formation of an adherent,dense,and fine-grained Al 2 O 3 -rich scale.Furthermore,inter-diffusion of Ni,Cr,Mo,Nb was observed betwe en the coating and substrate.

Abstract:采用硬度測試，金相顯微觀察和透射電鏡分析等方法，研究了微量稀土Er對高純鋁再結(jié)晶行為的影響，結(jié)果表明，彌散分布的細小Al3Er質(zhì)點對位錯和亞晶界具有釘扎作用，可以有效抑制再結(jié)晶，將高純鋁的再結(jié)晶溫度提高50左右，同時還能顯著細化再結(jié)晶晶粒，再結(jié)晶形核機制是亞晶聚合和亞昌長大雙重機制。

Abstract:The preparation of CuCr25(C)and CuCr25(W)alloys by vacuum inducing melting is presented in this paper.The influen ce of different alloy elements(C&W)on Cr-crystalline grain is studied.And the sequent effects on the physic al properties and breakdown voltage are also discussed.It is found that the mechanical strength and the voltage withstanding stress have been improved for the alloys with adding of C or W.

Abstract:采用草酸還原較高濃度HAuCl4溶液的方法，在PVP作保護的水溶液中，成功制備出了粒度平均為20nm～30nm且高度分散的金溶膠。分別討論了金溶膠制備過程中的各主要影響因素，如：pH值，還原劑濃度，保護劑用量及其加入方式等對金粒度分布與形狀的影響，研究表明，制備穩(wěn)定的納米金溶膠的較優(yōu)條件為：適中攪拌，pH值為4～5,還原劑與溶液中金質(zhì)量比3:1，PVP與金質(zhì)量比為1:1，反應溫度343K可制得粒度為20nm的金膠體。把HAuCl4加入PVP與Na2CO4的混合液中是較好的加入方式。

Abstract:介紹了陶瓷注射成型的1種新脫脂方法-超臨界流體脫蠟。利用非極性分子有機物石蠟（PW）與極性分子有機物聚丙烯（PP）及少量硬脂酸（SA）組成有機粘合劑，在壓力P=40MPa，溫度T=58℃的超臨界CO2流體中脫脂2h，石蠟萃取率大于80%，該方法可使陶瓷注射成型脫脂時間大大減少，脫脂過程縮短到通常脫脂的1/10。另外超臨界流體脫蠟明顯克服了傳統(tǒng)熱脫脂的變形，開裂等各種缺陷。

Abstract:The manufacture of carbonized La 2 O 3 -Mo cathodes for use in the 6T51tube,and their emission property were stu died.The study was based on current practice in the manufacturing of carbonized ThO 2 -W cathodes.Using similar techniqu es,carbonization of the La 2 O 3 -Mo cathode,evacuation of the carboniz ed La 2 O 3 -Mo cathode 6T51tube,and activatio n of the cathode were carried out.Mea surements taken on the6T51tube showed that the emission ab ility of the carbonized La 2 O 3 -Mo barely attained the lower limit o f clean W,let alone Th-W.Fur-thermore the emission is unstable an d the emission life can not be easily c ontrolled,possibly due to the consu mption of La and /or carbonized layer.

Abstract:The denitrogenation and desulphurization behavior during refining Ni-base superalloy in VIM by using CaO crucible was studied.It was found that the desulphurization process did not occur by only using Ca O crucible.Combining with the resul ts of XRD analysis,the desulphurization mechanism of CaO c rucible was proposed.The Al additio n had beneficial effect,and played a very important role on desulphurization.And the Ti addition had adverse effect on denitrogenation.It was a powerful measure to increase vacuum level for the denitrogenation process.

Abstract:用設計的循環(huán)Ar^ 轟擊-磁控濺射離子鍍法在U表面上鍍Ti，并采用掃描電鏡（SEM），X射線光電子能譜儀和濕熱加速腐蝕實驗。研究了其表面，剖面形貌，鍍層的組成與結(jié)構(gòu)，膜基界面特征，以及耐濕熱腐蝕性能。結(jié)果表明，U上循環(huán)Ar^ 轟擊-磁控濺射離子鍍Ti層結(jié)晶致密，晶粒細化，鍍層由表及里分別由TiO2/TiO/Ti構(gòu)成，鍍層厚度≥4μm時，其試樣的耐濕熱腐蝕性能較之金屬U來講有較大程度的提高。

Abstract:利用粉末燒結(jié)理論對比分析了機械合金化（MA）和高溫自蔓延（SHS）合成的MoSi2粉末的燒結(jié)性能，并闡明了原因。結(jié)果表明，二者合成粉末的燒結(jié)性能存在較大差別。機械合金化法比高溫自蔓延法至少降低了MoSi2的燒結(jié)溫度的250℃，機械合金化MoSi2粉末細、晶粒缺陷密度大，具有較高的活性，其燒結(jié)表觀活化能僅為高溫自蔓延粉末的37%，起到了顯著的機械活化燒結(jié)作用。實際中采用SHS 球磨的工藝有利于在較低燒結(jié)溫度獲得較致密的MoSi2材料。

Abstract:The pulsed magnet described in this p aper operates at liquid nitrogen tem perature and is used for the direct me asurement of magnetocaloric effect of magnetic materials.It uses a relatively small pulsed power supply(22kW).With pulsed duration of 1?2?3?4and 5seconds,respectively.The solenoid has a bore diameter of 20mm.The magn et system has operated steadily to 2.232T at 180A in ex-periments.The uniformity of magnetic field is better than 1%within 10mm of solenoid center.It is satisfied f or the testing of magnetocaloric effect of magnetic materials.

Abstract:擬定了利用石墨爐原子吸收測定銅合金、鋁合金及碳素鋼中微量鈦的分析方法，操作簡便，快速，靈敏度高，精密度好，從機理上探討和用實驗證明了用熱解石墨涂層管比碳化鋯涂層處理石墨管，碳化鉭涂層處理石墨管，平臺石墨管及標準石墨管測定鈦時的靈敏度要高，比較了4種有機試劑對測定鈦的效應，提高灰化溫度可以消除Fe,Al,Cu的基體干擾，且不影響鈦的測定。